Sen. John McCain invoked Watergate in describing the escalating controversy surrounding alleged ties between President Donald Trump’s campaign and Russia.

“I think it’s reaching the point where it’s of Watergate size and scale, and a couple of other scandals you and I have seen,” the Arizona Republican said Tuesday night. “It’s the centipede that the shoe continues to drop. Every couple of days, there’s a new aspect of this really unhappy situation.”

McCain discussed the series of scandals that brought down Richard Nixon’s presidency at the International Republican Institute’s 2017 Freedom Dinner, where he was being honored. He shared his thoughts about the latest White House news on a panel moderated by former “Face the Nation” host Bob Schieffer.