DAVID MARCUS: Where does the blue tsunami leave old school Dems like John Fetterman?

On Tuesday night, the American people triggered a political earthquake by thrusting Democrats into power in both the House and Senate by overwhelming margins. The defeat has already left the GOP in a circular firing squad of recrimination, but Democrats, too, must now face their own party's new divisions.

Thats where Pennsylvania Sen. John Fetterman, D-Pa., comes in front and center.

Fetterman in recent years has replaced former Sens. Joe Manchin, of West Virginia, and Kyrsten Sinema, of Arizona, as the most vocal and pugnacious moderate on issues such as immigration enforcement, support for Israel and a refusal to shut down the government to achieve liberal policy wins.

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Fetterman's penchant for criticizing progressive shibboleths was one thing when Democrats toiled in the minority, but how will incoming Senate Majority Leader Chuck Schumer, D-N.Y., and his leadership team deal with the Pennsylvania maverick now that they control the upper chamber?

It is possible that Schumer just waits Fetterman out. The latter is up for re-election in 2028 and currently, according to surveys, is more popular with Keystone State Republicans than with Democratic voters there, making his chances of retaining the seat, at least as a Democrat, rather remote.

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Fetterman, it should be noted, is not the only nominally moderate Democrat facing voters in a purple state in two years. There are also Patty Murray of Washington, Maggie Hassan of New Hampshire and Catherine Cortez Masto of Nevada. But one must ask: Will they be more afraid of a general election defeat from the right or a primary ouster from the left?

A year ago, Democrats had dreams of a Senate majority, but it wasn't quite the Senate majority they have wound up with. In Michigan, they expected a Haley Stevens or Mallory McMorrow, not an Abdul El-Sayed. In Maine, an Angie Craig, not a Troy Jackson. These avatars of the progressive wing of the party will be the celebrities of the next Congress.

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It is difficult to imagine this firebrand faction working hand in hand with a White House they flat-out accuse of fascism to pass bipartisan legislation. But just as hard-line MAGA senators have been frustrated by Senate Majority Leader John Thune's temperance on issues such as killing the filibuster, incoming leader Chuck Schumer may well wish to resist the resistance, so to speak.

In fact, establishment Democrats and media pundits have been quick to remind us all that the vast majority of Democrats serving at the Capitol are not of the socialist variety, even though the party's zeitgeist and primary wins such as those in Michigan and Maine are with them.

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The good news for Democratic leadership is that the scale of the victories Tuesday gives them big enough margins —