Donald Trump has warned Republican elites that his supporters know they are being 'disenfranchised' through the 'crooked shenanigans' of the GOP's delegate selection process.
'You know what? They're taking your vote away. They're disenfranchising people,' he said in between chants of 'USA!', 'we want Trump!' and 'build that wall!' among 10,000 fnas crammed into a private aviation hangar in Rochester, New York.
'I say this to the RNC and I say it to the Republican Party: You're going to have a big problem, folks, because the people don't like what's going on, Trump warned.
Trump had previously forecast 'riots' among the GOP's rank and file if he won more elected primary delegates than any other Republican candidate but were still denied the nomination.
'What we have going is a movement,' he said.
'Now, they're trying to subvert the movement. They can't do it with bodies. They can't do it with people because they don't have near the people that we have. So what they're trying to do is subvert the movement with crooked shenanigans. And we're just not going to let it happen.'
Trump said he 'should win' the Republican presidential nomination outright 'before we get to the convention' in July.
But on the heels of a series of statewide victories by his rival Ted Cruz that were the result of political arm-twisting, not ballot-casting, Trump appeared to be running out of patience.
One such state, Louisiana, saw the billionaire win unexpectedly by more than three per cent last month. But because Cruz's staffers showed up to take part in the Republican Party's post-election procedural wrangling, the Texas senator may go to the convention with more of the state's delegates than Trump.
'We've got a corrupt system,' Trump told supporters on Sunday.
'It's not right. We're supposed to be a democracy. We're supposed to be: You vote and the vote means something, all right? You vote, and the vote means something. And we've got to do something about it.'
'We should have won a long time ago but we keep losing where we're winning. Today winning votes doesn't mean anything,' he said.