With the Republican Establishment plotting to stop Donald Trump at the convention, the chairman of the Republican National Committee on Sunday all but gave his blessing to the maneuvering, saying the “process” must play out.

When asked by CNN’s Dana Bash his thoughts on a contested convention, Reince Priebus justified rules that could deny Trump the nomination even if he is a bit short of the delegates needed.

“History would show … when someone’s a little bit short, you let the process play out, and if it’s that close, that’s generally what happens,” Priebus said.

Anti-Trump Republicans in recent days have been quietly meeting in recent days to figure out ways to thwart Trump at the convention and possibly run an independent candidate if they fail. Trump’s two remaining GOP opponents, Sen. Ted Cruz and Gov. John Kasich, have both embraced a strategy of preventing Trump from gaining the majority of delegates needed.

Kasich has been open about his intention to seize the nomination at a convention.

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“Chris, nobody is going to have enough delegates, we are going to go to a convention, it’s going to be open,” Kasich said in an interview with Chris Wallace on “Fox News Sunday.” “I see the convention as nothing more than an extension of this whole political process,” Kasich added.

Kasich said he is the only candidate who can win in the fall and who can win at the convention.

On NBC’s “Meet the Press,” the Ohio governor even called for Cruz to drop out of the race. “Maybe Ted ought to get out because he can’t win in the fall,” Kasich said.

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Trump has suggested that rioting may occur if he is close to the magic number of 1,237 delegates but denied victory. Sunday, he said he would urge supporters not to riot.

“Well, I would certainly tell them that, but, you know, look, these people are — are fervent,” Trump said on ABC’s “This Week.” “They are really — they want to see positive things happen for our country. And I would certainly say that. I don’t want to see riots. I don’t want to see problems.”

Kasich called out Trump’s rhetoric, but also expressed sadness at how the violence has escalated — specifically in regard to Trump’s family receiving threats. Trump’s son Eric received a letter containing white powder — which appears to have been harmless — and warning that Trump’s kids would be harmed if he did not withdraw from the race.

“I heard yesterday that his family was threatened and that disappointed me,” Kasich said on “Fox News Sunday.” “But I also have pointed out at times that I thought his language was inappropriate like, ‘If I don’t get nominated there’s going to be a riot,’” he said.

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“This Week” host George Stephanopolous pressed Trump on recent violent outbreaks at his latest campaign rallies in Arizona, where his campaign manager appeared to manhandle a protester and a Trump supporter was seen punching a protestor. Trump denied that his campaign manager, Corey Lewandowski, grabbed the protester, despite video evidence showing he did. He said he does not support violence.

“We don’t condone violence and I say it,” said Trump on ABC’s “This Week.” “And we have very little violence, very, very little violence at the rallies. Uh, as I said, in Phoenix, we had 21,000 people. We had — we didn’t even have anybody stand up and — and try and disrupt, you know, the disrupters. And they’re really stopping our First Amendment rights.”