GOP Chair Tells Donald Trump It's 'Up to the Campaigns to Understand' Delegate Rules

— -- The chairman of the Republican Party pushed back against GOP presidential front-runner Donald Trump's accusations that the nomination process for selecting delegates to their July convention is "rigged."

"The rules were put out there over a year ago," Reince Priebus said today in an interview on "Good Morning America." "It's up to the campaigns to understand them."

Priebus also said the process needs no reform, as Trump has been arguing.

"I mean the system has been around for a long time. It was good enough for Abraham Lincoln. I think it's good enough for whoever our nominee is going to be," Priebus said. "So, look, this is democracy in action.

"It isn't easy," Priebus said of the nomination process. "I'm not trying to claim it isn't and there is drama, but that's what our party needs to do. We need to come together. We need to pick a nominee."

The GOP chairman also fought back against Democratic National Committee Debbie Wasserman Schultz's assertions that the Republicans are in a "civil war food fight" and, by the end of the convention in Cleveland, "the Republican party will not be the Republican party of today and will likely blow themselves to smithereens."

"Debbie doesn't really have any room to talk," Priebus said. "They're gouging each other's eyes out and the director of the FBI is reviewing a possible indictment of Hillary Clinton."