US House set for key debt vote on Republican bill

A revised Republican bill to raise the US debt ceiling, cut spending and avert a federal default is set for a crunch House of Representatives vote later.

But House Speaker John Boehner's bill faces a conservative revolt, opposition by Senate Democrats and a White House veto threat.

Republicans needs 217 member out of 433to pass it.

Mr Boehner told dissenting colleagues on Wednesday: "Get your ass in line."

The US Treasury has warned the government will run out of money to pay all its bills unless a $14.3tn borrowing limit is enhanced by next Tuesday.