Senators appeared no closer on Friday to a resolution that could end the longest government shutdown in history, as lawmakers were prepared to remain in Washington for a rare weekend session.

Tensions flared between the parties as the otherwise mild-mannered Senate Majority Leader John Thune (R-SD) traded barbs with Democrats. Republicans slammed a counteroffer from Senate Minority Leader Chuck Schumer (D-NY) to address expiring Obamacare subsidies as dead on arrival and an unserious attempt to end the shutdown stalemate.