WASHINGTON — The largest union of federal workers called on Monday for Congress to pass a spending bill to immediately end the government shutdown, effectively siding with President Donald Trump and Republicans who have opposed Democratic efforts to restore health care spending.

“Both political parties have made their point, and still there is no clear end in sight,” Everett Kelley, the president of the American Federation of Government Employees, said in the statement. He added, “It’s time to pass a clean continuing resolution and end this shutdown today. No half measures, and no gamesmanship.”

The statement was a remarkable shift for the union. Before the shutdown began Oct. 1, Kelley called on Republicans to negotiate with Democrats, who are seeking concessions including the extension

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