Myriad problems have arisen. Moderate Senate Democrats Joe Manchin (W.Va.) and Kyrsten Sinema (Ariz.) continue to be a major headache for party leadership’s $3.5 trillion target. The Senate parliamentarian just nixed the party’s yearslong push to enact broad immigration reform. House members may tank the prescription drugs overhaul the party has run on for years. And a fight continues to brew over Sen. Bernie Sanders’ (I-Vt.) push to expand Medicare.

“If any member of Congress is not concerned that this could fall apart, they need treatment,” said Rep. Emanuel Cleaver (D-Mo.), who warned his party “will pay for it at the polls” if it fails in enacting Biden’s agenda. “Our caucus has the feeling of freedom to support or oppose leadership.”…

“None of us know where this is gonna go,” said Rep. Dean Phillips (D-Minn.). “This is where leadership is made or broken, plain and simple. And that’s true of the president, that’s true of speakers, that’s true of majority leaders.”…

It’s unclear exactly how many Democrats are siding with prominent House and Senate moderates. One centrist Democrat up for reelection next year, Sen. Maggie Hassan (D-N.H.), declined to say whether she’s comfortable with the $3.5 trillion spending number on Monday, or whether she agrees with pausing the legislation.