On a current Sunday night, a few dozen liberal housing activists from New York gathered for a digital assembly with Senator Chuck Schumer. Although the newly anointed majority chief had served in Congress for 4 many years, quite a few individuals had scarcely interacted with him earlier than, and a few regarded him as an unsure ally.

However Mr. Schumer was keen to supply reassurance. At one level, he described himself as a former tenant organizer who was now ready to ship on housing points on a grand scale, a number of individuals recalled.

“He had carried out a bunch of homework and knew every little thing that we had been going to ask about and made a bunch of commitments with us to make it occur,” mentioned Cea Weaver, a strategist for New York’s Housing Justice for All coalition. “He was like: I’m speaking to Ilhan Omar, I’m speaking to Bernie Sanders, I’m speaking to A.O.C.”

The January assembly was one in a sequence of steps Mr. Schumer has taken to win over leaders of the left in New York and Washington forward of his marketing campaign for re-election in 2022. Armed with a sweeping set of coverage guarantees, he’s courting the activists, organizers and next-generation elected officers in New York who would possible make up the spine of an effort to dethrone him, ought to one ever come up.

He’s dealing with a rare balancing act within the coming days as he seeks concurrently to forge an enormous reduction invoice to counter the coronavirus pandemic whereas managing the impeachment of former President Donald J. Trump. Each duties are seen as pressing sensible and ethical imperatives by the Democratic Celebration’s electoral base.

Mr. Schumer, 70, has been trying to channel his get together’s sense of impatient function: In current days, he has publicly urged President Biden to “go huge and daring” along with his financial insurance policies and govt actions, defying strain from Republicans and some centrist Democrats to pare again marketing campaign guarantees.

Over the past week, Mr. Schumer has backed a brand new push to decriminalize hashish; signed on to Senator Cory Booker’s Child Bonds proposal, a plan to deal with the racial wealth hole; and appeared with Senator Elizabeth Warren and different progressives to name on Mr. Biden to cancel pupil debt.

On impeachment, too, Mr. Schumer has taken an into-the-breach strategy, demanding Mr. Trump’s elimination from workplace the morning after the Jan. 6 assault on the Capitol and casting the upcoming trial as an important ritual of accountability even whether it is extremely inconceivable that two thirds of the Senate will vote for conviction.

Maurice Mitchell, the nationwide director of the Working Households Celebration, mentioned Mr. Schumer was emphatic in non-public conversations that he intends to “get actually huge issues carried out” regardless of the daunting Senate math. Mr. Mitchell mentioned he spoke ceaselessly with Mr. Schumer however had not but mentioned the 2022 marketing campaign with him.

“He’s going to have to make use of all of the instruments at his disposal to maintain his caucus collectively; he will get that, all of us get that, it’s not a shock,” Mr. Mitchell mentioned. “I believe he’s additionally actually clear that the choice is unacceptable — that he completely has to ship.”

The brand new Senate chief seems to acknowledge that his political playbook requires updating. A compulsive retail politician and prodigious fund-raiser, Mr. Schumer climbed to energy much less as a legislative engineer and an writer of massive concepts than as a marketing campaign tactician with a monetary base on Wall Avenue and a eager eye for locating the political midpoint between liberal New York Metropolis and its traditionally conservative suburbs.

David Carlucci, a former state senator from Rockland County who misplaced a Home main in 2018 to a extra progressive candidate, Consultant Mondaire Jones, mentioned a various new era was reworking state politics. Mr. Schumer seems comparatively safe, he mentioned, however no Democrat ought to really feel immune.

“Any politician that’s a part of the previous guard needs to be very involved a few potential main,” mentioned Mr. Carlucci.

That’s a lesson that progressives delivered to institution Democrats within the final two election cycles, when losses by Joseph P. Crowley and Eliot L. Engel, two senior Home members, marked back-to-back breakthroughs for left-wing politics in downstate New York.

In contrast to Mr. Crowley and Mr. Engel, the Senate chief stays a ubiquitous presence round New York. However his potential to match the passions of his personal get together is one other query.

Mr. Schumer drew periodic complaints from the left all through the Trump years for taking a usually cautious strategy to messaging and marketing campaign technique, together with in key Senate races final yr the place Mr. Schumer handpicked average recruits who ultimately misplaced in states like Maine and North Carolina. There’s restricted endurance now amongst Democrats for the sort of incremental maneuvering and horse-trading that’s historically required to go legal guidelines within the Senate.

In a press release, Mr. Schumer mentioned he was attempting to “do the most effective job for my constituents and for my nation” and acknowledged a shift within the scope of his governing targets.

“The world has modified and the wants of households have modified,” he mentioned, “earnings and racial inequality has worsened, the local weather disaster has change into extra pressing, Trump has attacked our democracy — all of this stuff require huge, daring motion and that’s what I’m combating to ship within the Senate.”

For the time being, probably the most critical potential challengers to Mr. Schumer — Consultant Alexandria Ocasio-Cortez chief amongst them — haven’t taken steps towards a marketing campaign. Ms. Ocasio-Cortez, the 31-year-old Queens lawmaker, has advised associates that she has not determined whether or not to run however that she believes the opportunity of a problem serves as a constructive type of strain on Mr. Schumer, individuals who have spoken along with her mentioned.

Different potential opponents seem extra centered on assembling a bid to unseat Gov. Andrew Cuomo.

But Mr. Schumer appears to need to deter even a quixotic opponent who might change into a nettlesome distraction or worse. He has taken to utilizing Twitter and cable-news interviews to demand that Mr. Biden take daring govt actions on issues like pupil debt and local weather change.

And as he assumes the expanded powers of the Senate majority, Mr. Schumer is drawing on previous and new alliances to assist him govern.

Beginning final spring, Mr. Schumer convened a number of convention calls to craft pandemic reduction plans with a number of the huge coverage minds of the Democratic Celebration. They included extra centrist voices, like the previous Treasury Division official Antonio Weiss; progressive financial thinkers like Felicia Wong of the Roosevelt Institute and Stephanie Kelton of Stony Brook College; and liberal think-tank leaders Heather Boushey and Michael Linden, who now serve within the Biden administration.

Mr. Schumer’s common conferences with nationwide liberal advocacy teams have intensified in current weeks, and he has been spending time with a cohort of New York progressives elected during the last yr. In December, he met with State Senator Jabari Brisport, a 33-year-old democratic socialist elected final fall, at a bar in Bedford-Stuyvesant, and burdened his assist for addressing local weather change.

“We joked about me being a socialist in Brooklyn,” Mr. Brisport mentioned, recalling that Mr. Schumer had famous he works nicely with Mr. Sanders, who can be a socialist from Brooklyn.

Consultant Ritchie Torres, a 32-year-old progressive who captured an open Home seat within the Bronx final fall, mentioned Mr. Schumer was the primary official to contact him after Mr. Torres gained a contentious main; quickly afterward, Mr. Schumer visited his district for a gathering about increasing the federal baby tax credit score.

Mr. Torres mentioned he supposed to again Mr. Schumer in any contested main. “Indisputably, he deserves to be re-elected,” Mr. Torres mentioned.

Ought to Mr. Schumer wrestle to show his splashy endorsements of daring motion into regulation, or come to be seen as balking at sure clashes with Republicans, a critical problem might nicely emerge. Mr. Schumer faces a dense ideological minefield on issues starting from financial restoration laws to abolishing the filibuster and attaining statehood for Washington, D.C.

“The strain is on now that he is likely one of the strongest politicians in your entire nation,” mentioned Assemblyman Ron Kim, a progressive legislator. “If he can’t ship, it’s not simply him — it’s the get together that may undergo in two years or 4 years.”

State Senator Jessica Ramos, a Queens Democrat who in 2018 beat a conservative incumbent in a main, mentioned she believed Mr. Schumer had been conscious of liberals however that she was ready to see exhausting outcomes earlier than endorsing him. She mentioned she had been “disenchanted” that Mr. Schumer didn’t take a more durable line in his power-sharing negotiations with Senate Minority Chief Mitch McConnell.

“We’ve to face as much as these individuals who don’t care to place ahead laws that’s humane and that takes care of the folks of this nation.” Ms. Ramos mentioned.

Individuals who have spoken with Mr. Schumer a few attainable main problem say he’s assured about his probabilities in opposition to Ms. Ocasio Cortez or anybody else; he factors to his assist within the suburbs and amongst Black voters in New York Metropolis, arguing it could be troublesome for an opponent from the left to beat these benefits. Because the first-ever Jewish Senate majority chief, he would possible have appreciable power amongst an necessary inhabitants of left-leaning whites.

However Mr. Schumer absolutely additionally is aware of that coalitions might be fleeting and versatile. He’s mentioned to have saved a detailed watch on Senator Edward Markey’s main marketing campaign in Massachusetts final yr in opposition to Joseph P. Kennedy III. Mr. Markey, a fellow septuagenarian, bested his youthful and better-known rival by campaigning as an environmental justice champion and aligning himself carefully with Ms. Ocasio-Cortez and teams like Dawn.

A number of days after Mr. Markey gained his main, Assemblywoman Yuh-Line Niou, a liberal Manhattan Democrat, spoke briefly with Mr. Schumer at a Sept. 11 memorial occasion in her district. Annoyed by Mr. Cuomo’s opposition to rising taxes on the rich, Ms. Niou mentioned she appealed to Mr. Schumer for assist elevating direly wanted income. He was supportive, she mentioned, however on the time Republicans managed the Senate.

Ms. Niou mentioned she was supportive of Mr. Schumer and believed it was “actually necessary that New York has the bulk chief as their member.” However she mentioned she supposed to push Mr. Schumer to take advantage of the job.

“Each single factor I requested for, I’m going to ask for 5 thousand instances more durable,” she mentioned.

John Washington, a Buffalo-based housing organizer who participated within the January assembly with Mr. Schumer, mentioned he had seen a marked shift in the senator. Previously, he mentioned, Mr. Schumer would search out assist for his personal priorities and provide “radio silence” on activist targets.

“I believe it’s clear to everybody that there’s sort of a brand new age of politics,” he mentioned.