More than 800,000 federal employees face unpaid leave with no guarantee of back pay. It is the first partial shutdown in 17 years.
The Twitter account for the US Capitol : "Due to a lapse in government funding, this account will not be active until further notice,".
Barack Obama tweeted after midnight: "They actually did it. A group of Republicans in the House just forced a government shutdown over Obamacare instead of passing a real budget."