Republican presidential front-runner Donald Trump late Wednesday highlighted a “big protest march” in Colorado on Friday after he was shut out of delegates in the state.

Trump fired off several tweets, claiming that “over one million people have been precluded from voting” and that party rules were designed to hurt his campaign.

Biggest story in politics is now happening in the great State of Colorado where over one million people have been precluded from voting!

— Donald J. Trump (@realDonaldTrump) April 14, 2016

The rules DID CHANGE in Colorado shortly after I entered the race in June because the pols and their bosses knew I would win with the voters

— Donald J. Trump (@realDonaldTrump) April 14, 2016

Big protest march in Colorado on Fridayafternoon! Don’t let the bosses take your vote!

— Donald J. Trump (@realDonaldTrump) April 14, 2016

{mosads}Asked in an interview aired Thursday morning on “Fox and Friends” if he thought the state intentionally announced the change after he declared his bid, Trump responded, “I think so, yeah, I think so, because they saw that I do very well in Colorado, so I think so.”

Party officials have been pushing back for days against Trump’s claims, noting that rival Ted Cruz simply took advantage of the delegate selection process after the state announced last August that it was scrapping its preference poll for local caucus-type meetings leading up to a state convention.

Cruz took all 34 delegates up for grabs in the state, where the Trump campaign did not have a robust organization to secure support. Trump has lashed out for days against the results, and the state Republican Party chairman indicated he’s been getting death threats over the outcome.

A few hundred people have indicated online they plan to “peacefully assemble” outside the state Capitol on Friday to protest.

Trump’s schedule has him traveling to Connecticut on Friday after campaigning in New York ahead of the state’s Tuesday primary. He’ll have a rally in Syracuse, N.Y., on Saturday.