A controversial healthcare reform bill in the United States will finally come to a vote in Congress on Sunday, as President Obama and his administration work all out to get the majority needed to see the bill passed.

"I feel very sure that we will vote sometime after 2 o'clock on Sunday and the bill will pass," Democratic Representative James Clyburn, the top House vote-counter, told reporters.

Obama has postponed, to June, a planned trip to Asia in order to weigh-in in the 11th hour and make personal appeals to undecided members of the House of Representatives.

The bill aims to extend medical coverage to 32-million Americans who currently don’t have any. The US is the only industrialized nation in the world that does not offer universal healthcare coverage to citizens.

According to the Democratic plan, the House must approve the Senate’s version of the legislation on Sunday, so that both chambers could approve whatever ‘fixes’ are implemented to make the bill more to the House’s liking.

Republicans in the House of Representative emphasized their united opposition to the bill.

"We're going to continue to work closely together to do everything that we can do to make sure that this Bill never, ever, ever passes," said Republican House Minority Leader John Boehner.

Obama’s team has used figures from the independent Congressional Budget Office (CBO) which shows that the Bill would cut the US budget deficit by $138-billion by 2019 and $1,2-trillion the following decade.

"This is but one virtue of a reform that will bring the accountability to the insurance industry and greater economic security to all Americans," said Obama.