In Washington, Policy Revolves Around Joe Manchin. He Likes It That Way.

WASHINGTON — If Democrats eliminate the filibuster, there is one senator who would have an outsized impact in the 50-50 chamber on issues that could reshape the nation’s future: infrastructure, immigration, gun laws and voting rights. That senator is Joe Manchin III of West Virginia.

There is also a senator whose opposition to eliminating the filibuster is a significant reason it may never happen. That senator, too, is Mr. Manchin.

“He should want to get rid of the filibuster because he suddenly becomes the most powerful person in this place — he’s the 50th vote on everything,” said Senator Chris Coons, Democrat of Delaware, sketching out the argument.

Mr. Manchin, however, does not see it that way. To the exasperation of Democrats, delight of Republicans and bewilderment of politicians who can’t understand why he wouldn’t want to wield more power, Mr. Manchin, a former governor of the state, isn’t budging.

He was less happy about Vice President Kamala Harris’s effort to nudge him on the legislation by making an appearance on a television affiliate in West Virginia to promote the bill without forewarning him. The clip went viral and, Mr. Manchin said, prompted cleanup conversations with Mr. Biden and the White House chief of staff, Ron Klain.

As for any pressure that he may feel on the filibuster, Mr. Manchin said he had reminded Senator Chuck Schumer, the majority leader, of how essential he was to providing Democrats a majority.

He said he had told Mr. Schumer, “I know one thing, Chuck, you wouldn’t have this problem at all if I wasn’t here.”

He is not the only impediment to the sort of expansive liberal agenda preferred by many congressional Democrats or even the only one still defending the filibuster. Other Senate Democrats, including Kyrsten Sinema of Arizona, also share his reluctance.

Yet none are as eager as Mr. Manchin to restore a bygone day of collegiality. And perhaps, more to the point, none are as happy as him to talk about the need to do so as he navigates representing a once-heavily Democratic state that had been shifting to the G.O.P. even before Mr. Trump arrived on the scene.

He crossed the aisle last year to endorse his closest Republican ally, Senator Susan Collins of Maine, and is already co-hosting bipartisan lunches with her. He is plotting the post-pandemic restoration of his pizza-and-beer parties on the boat he calls home while in Washington. (It’s called “Almost Heaven,” the opening lyric to John Denver’s ode to West Virginia.)

Although some of his colleagues relish the ideologically-charged prime-time cable news programs, Mr. Manchin prefers another Washington institution that also flourished in less-polarized times: the Sunday morning show.

In the fashion of many former governors who grow exasperated with Washington’s glacial pace, at times he can barely contain his impatience. He’s repeatedly mused about leaving the Senate and trying to reclaim his old job in Charleston.

But those who know Mr. Manchin well believe he likes the attention that he receives in the capital, the same as he did as a signal-caller in Farmington, W.V., where he grew up near Nick Saban, the legendary football coach at the University of Alabama and a lifelong friend of Mr. Manchin.

“You’re in the hot seat when you’re a quarterback, but it’s pretty satisfying when you make progress,” said Nick Casey, a Manchin ally and former chairman of the West Virginia Democratic Party. Mr. Casey said the senator, who sustained an injury that cut short his playing days, was “the greatest QB who never got to start at West Virginia University — just ask him.”

Steve Williams, the mayor of Huntington, W.V., who served with Mr. Manchin in the state legislature, said: “This is the closest he has been to how he could be as governor, actually driving the agenda, pulling people together.’’

It’s the last part that most animates the senator. Happily bantering with reporters as he positions himself as a lonely, if well-covered, voice for comity, he shifts questions from policy to process.

“Why don’t you ask people when was the last time they took time to talk to some of the people on this side?” Mr. Manchin told a CNN reporter this week. “Try to convince them, or work with them. Have you had dinner with them? Have you had a lunch with them? Have you had a cup of coffee with them? Try something.”

A number of anti-filibuster Senate Democrats, though, are more focused on what Mr. Manchin’s support of the “talking filibuster” could portend.

“I think that gives us a lot of room for discussion,” said Senator Elizabeth Warren of Massachusetts, adopting a glass-is-half-full perspective.

What does seem clear is that Mr. Manchin is not going to switch parties.

“I don’t think that’s going to happen, although we’d welcome him with open arms,” said Ms. Collins, who has tried in the past to persuade her friend to join Republicans.

It’s not difficult to see why Mr. Manchin remains in his forefathers’ party. A Catholic of Italian descent, he sought John F. Kennedy’s desk when he arrived in the Senate, displays a picture of the slain president in his office lobby and can recall hearing that Massachusetts accent in his kitchen when Kennedy’s brothers came to his parents’ house during the West Virginia primary in 1960.

“Joe reminds me a lot of the old conservative Democrats in Texas,” said Senator John Cornyn, Republican of Texas. “They were born Democrats. They’re going to die Democrats.”

As for the filibuster, Mr. Coons, who was sworn in alongside Mr. Manchin in 2010, said liberals shouldn’t get their hopes up.

Recalling a conversation with somebody who knows Mr. Manchin well, Mr. Coons said this person told him: “If the ghost of Robert Byrd came back to life and said the future of West Virginia itself is on the line he might … think about it.”

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