Senate leaders wish Ms. Pelosi had not let her committee leaders draft pieces of the bill on their own, since the measure being stitched together this weekend is likely to cost well over $3.5 trillion and build expectations that will have to be dashed.

House Democrats are largely in the dark about the Senate’s plans, since Mr. Schumer is writing his version behind closed doors.

And some of Ms. Pelosi’s problems are arguably of her own making. When a small group of centrist Democrats threatened to vote against a budget blueprint needed to push through the social policy and climate change bill without the promise of a quick vote on the Senate-passed infrastructure bill, the speaker largely gave in, committing to a vote on the infrastructure measure by Monday…

Now, Monday is upon her, and the larger bill is nowhere close to ready, so Ms. Pelosi tried to create at least the appearance of progress in hopes of securing liberal votes for the infrastructure bill. That has meant a largely meaningless declaration on Thursday that an agreement had been reached on a “framework” for paying for the larger bill, and a rare Saturday session of the House Budget Committee to formally draft a 2,465-page version of the bill that has no chance of passage — and little prospects even for a vote in the full House.