WASHINGTON (AP) — The next move is up to the Senate -- but it's not expected to make a partial government shutdown tonight any less likely.

About 800,000 federal workers will be forced off the job without pay if no compromise can be reached by midnight on the legislation that would keep government agencies funded.

A rejection by the Senate would send the measure back to the House, where conservative Republicans are determined to delay by a year some key parts of President Barack Obama's health care law.