Trump has been criticised by abortion supporters and opponents for not being clear about his position on the hot-button political issue.

Abortions are still fiercely opposed by many Republicans, four decades after the US Supreme Court affirmed its legality nationwide.

"The laws are set now on abortion and that's the way they're going to remain until they're changed," Trump said in an interview with the NBC News program Face the Nation.

Later in the interview, which will air in full on Sunday, Trump said he agreed that "abortion is murder".

Hours after the interview excerpt was released yesterday, Trump campaign spokesperson Hope Hicks denied his candidate was backtracking on his opposition to abortion.

The 69-year-old Trump –  who has been a Democrat, a political independent and is only a recent convert to the 'pro-life' anti-abortion position –  has been accused of flip-flopping on the issue.

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