Democrats decried the measure as a White House power grab, leaving it unclear whether the legislation could pass.

Republicans in the House released a stopgap spending plan over the weekend that would delay a government shutdown for at least six months, but it's unclear if they have the votes to pass the measure.

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.