After special counsel Robert Mueller charged two campaign advisers on Donald Trump’s campaign, and secured a plea deal with the president’s former foreign policy adviser for lying about contacts with Russia, most Republicans avoided questions about the developments.

“It’s troubling to see such appalling silence by all Republicans leaders,” Perez said at a breakfast hosted by the Christian Science Monitor on Tuesday. "It’s appalling because we are Americans first.”

Perez said Republicans should look to history, and not repeat how their party handled the Watergate scandal under President Richard Nixon. Republicans were too slow to break with Nixon then, Perez said.

“The rot went all the way to the top of the campaign,” Perez added of Trump’s presidential team.

The indictments prompted Democrats to warn Trump to not interfere with Mueller’s investigation, and White House spokesperson Sarah Sanders said Trump has no plans to fire Mueller.

Trump tweeted out that the indictment of Paul Manafort, Trump's former campaign manager, didn't involve his campaign in any way, as it dealt with money laundering and tax evasion that happened before Manafort joined the campaign.