The stopgap measure would keep the government funded through Sept. 30. But Democratic leaders are opposed, and it’s unclear if Johnson can pass it with only Republicans.

House Republicans unveiled a spending bill Saturday that would keep federal agencies funded through Sept. 30, pushing ahead with a go-it-alone strategy that seems certain to spark a major confrontation with Democrats over the contours of government spending.

With less than a week to go before a March 14 shutdown deadline, it is not clear if Republicans have the votes to pass the continuing resolution unveiled Saturday.