Over the weekend and continuing into this week, Donald Trump has complained about the process in the GOP nomination fight. While Trump and his supporters have called the process unfair after being swept of delegates in Colorado, the RNC chairman says that the rules have been in place for a year according to POLITICO.

"This is going to blow over. I believe this is some frustration that has bubbled up," the Republican National Committee chairman told CNN Wednesday.

Trump once again went nuclear against party leaders after he was shut out at Colorado's convention this past weekend, while Ted Cruz swept up 34 delegates. The Republican frontrunner — who is scrambling to score the 1,237 delegates needed to win the nomination outright — has repeatedly called the system "rigged" and "crooked" this week.

He also lashed out directly at Priebus, saying the RNC chairman should be "ashamed of himself" for allowing the delegate selection process to work as it does.

Priebus on Tuesday night hit back on Twitter, saying, "Nomination process known for a year + beyond. It's the responsibility of the campaigns to understand it. Complaints now? Give us all a break."

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