US President Donald Trump has lashed out at the media about the coverage of his replacement healthcare bill.

The American Care Act, intended to replace the Affordable Care Act, narrowly passed through the House on Thursday (4 May) – but coverage of the victory in the press has earned Trump's ire.

Reviving his oft-used "fake news" phrase, the president took to Twitter to complain about how the story was reported in the press.

He wrote: "Wow, the Fake News media did everything in its power to make the Republican Healthcare victory look as bad as possible. Far better than Ocare!"

Several news outlets had reported the concerns raised by pressure groups that the new healthcare bill passed by the House would leave millions of Americans without healthcare insurance.

In addition, it is not yet clear whether the bill will make it through the Senate – with GOP's slim 52-member majority giving them little margin for defectors – something that has been widely reported in the press.

Why is it that the Fake News rarely reports Ocare is on its last legs and that insurance companies are fleeing for their lives? It's dead! — Donald J. Trump (@realDonaldTrump) May 5, 2017

The feeling among GOP senators does not appear to be overly enthusiastic about the healthcare bill.

Several have raised questions about how the legislation would provide for people with pre-existing medical conditions or those who do not have much money.

Some senators also appear to be unsure what the House voted on.

"Don't know what's in it," Senator Lindsey Graham said before the vote. "Waiting to see if it's a boy or a girl."