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 Speaker Mike Johnson formally unveiled plans on Saturday for a government funding stopgap through September 30 — a measure intended to stave off a potential March 14 shutdown and buy time for Donald Trump and GOP leaders to steer key pieces of the president’s agenda through Congress this summer.

The 99-page bill would provide a slight boost to defense programs while trimming nondefense programs below 2024 budget year levels.

House Speaker Mike Johnson on Saturday unveiled a short-term funding bill that would keep federal agencies funded through September and fend off the looming government shutdown. The 99-page ‘‘Full-Year Continuing Appropriations and Extensions Act,