.By Mary Ellen McIntire, Daniela Altimari and Andrew Menezes

In March, 10 members of the Senate Democratic Caucus backed a procedural motion to advance a stopgap funding bill and avert a government shutdown. Minority Leader Charles E. Schumer, in particular, faced significant backlash from his party’s progressive wing and drew talk of a future primary challenge.

When the Senate took up procedural votes again this week on a House-passed bill to extend funding for government agencies, just three of those 10 senators — Pennsylvania’s John Fetterman, Nevada’s Catherine Cortez Masto and Maine’s Angus King — joined Republicans, plunging the federal government into its current predicament.

This change underscores the political shifts that have hit Democrats this year. Their voters are increasi

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