First Read: “Biden’s task won’t be easy, however. He’ll be flanked on one side by Kamala Harris (who charged at him on bussing and segregationist senators in Miami), and one the other side by Cory Booker (who’s loaded for bear on Biden’s 1994 crime bill).”

“By the way, last night’s debate stage was all-white, while tonight’s is full of diversity – Harris, Booker, Castro and Yang.”

Jonathan Bernstein: “One interpretation is that Republicans don’t expect to return to a House majority in 2020. The current breakdown is 235 Democrats, 197 Republicans, one independent (the former Republican Justin Amash), and two vacancies last held by Republicans. So the party, if it holds the two open seats and wins back Amash’s, would only need to gain 18 others to restore its majority. A spate of retirements signals that they don’t really think that’s likely.”

“The thing about House elections is that expectations matter. A lot. The more a party thinks it’s going to be a good year, the more it will attract the resources needed to win, including strong candidates.”

“As for the timing? It’s possible that all the new retirements were long planned. It’s interesting, though, that they come after Robert Mueller’s testimony revived interest in President Trump’s scandals – and, perhaps more relevant, after Trump’s ‘send her back’ rally and his continuing series of bigoted tweets. It’s not crazy to speculate that one or more of these Republicans just didn’t want to campaign for reelection in that kind of atmosphere.”

New York Times: “On an evening that could have produced explosions in their own political rivalry, Sens. Bernie Sanders and Elizabeth Warren instead formed something of an ideological tag team to defend their shared agenda, above all on health care. Though each is seen as the other’s chief obstacle in the Democratic race, Mr. Sanders and Ms. Warren did not at any point clash directly.”

“Instead, they battled an array of comparatively obscure candidates who used the debate as an opportunity — and for some of them, likely a last chance — to express alarm about their party’s embrace of immense liberal policy goals, like the creation of a ‘Medicare for all’-style health care system, Mr. Sanders’s No. 1 issue, and a broad liberalization of the immigration system.”

Dan Balz: “Warren and Sanders more than stood their ground during two spirited hours of sharp and passionate exchanges.”

Washington Post: “Ten more candidates, including former vice president Joe Biden, are scheduled to appear on the stage Wednesday, on the second night of this round of debates hosted by CNN. Yet Biden, whose lead in the polls has been one of the most enduring aspects of the Democratic primary contest, was not mentioned by name Tuesday night. Instead, other moderates were used as stand-ins for some of the ideas he espouses.”

Ten Democratic presidential candidates will debate on CNN beginning at 8 p.m. ET.

The lineup: Bernie Sanders, Elizabeth Warren, Pete Buttigieg, Beto O’Rourke, Amy Klobuchar, Steve Bullock, Tim Ryan, John Hickenlooper, John Delaney and Marianne Williamson.

Dave Weigel: “Tonight’s 10-candidate Democratic debate in the Fox Theatre will be a major media event and a pivotal moment in the presidential primary. And it’s not expected to change much of anything.”

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