Trump nomination: Republicans burn their voter registration cards in protest

'For too many Americans, the choice between Hillary Clinton and Donald Trump feels like a choice between being shot in the head, and being shot in the head' - Republican activist Liz Mair

Republican party members have begun burning their voter registration cards in protest over Donald Trump all but securing the party's presidential nomination.

The symbolic acts follow Senator Ted Cruz's withdrawal from the Republican race after losing to Mr Trump in the Indiana primary.

It leaves the billionaire businessman the likely candidate to take on the Democratic nominee in November, which is likely to be Hillary Clinton

Posting videos of the burning cards on Twitter, the party members announced they were quitting the party.

Others GOP members, less dramtically, chose to snapshot and tweet the moment of leaving the party:

Republican Liz Mair, who co-founded an anti-Trump PAC called Make America Awesome, said of Trump's victory in Indiana: "In view of tonight's events, it's obviously significantly harder to see how Donald Trump does not become the GOP nominee.

"For too many Americans, the choice between Hillary Clinton and Donald Trump feels like a choice between being shot in the head, and being shot in the head, with perhaps the only 'third way' being a vote for the Libertarian Party candidate or a write-in, just to ease the conscience.

"In any event, I expect the onslaught from the Democratic Party to be imminent, brutal, and devastating."

The only remaining opposition, Ohio Governor John Kasich, is not expected to overturn Trump's lead with only 14.7 per cent in the polls.