Sen. Jeff Flake, R-Ariz., criticized President Trump and said calling political adversaries names was not a governing philosophy, but rather a “game.”

“I think when the voters realize that anger and resentment is not a governing philosophy, then we’ll come back to traditional conservatism,” Flake told "The Daily Show" host Trevor Noah Monday night. “I’m a conservative, I believe that conservative policies — limited government, economic freedom, individual responsibility — those are the principles that have animated the party for a couple of generations, ever since Barry Goldwater. And that’s a governing philosophy. But just inventing nicknames for your opponents, that’s not a philosophy, that’s a game.”

Trump and Flake have sparred previously, especially after Flake published a book, Conscience of a Conservative, that criticized Republicans who backed Trump.

Trump has also expressed support for former Arizona state lawmaker Kelli Ward, who is planning to run against Flake in the Republican primary.

"Great to see that Dr. Kelli Ward is running against Flake Jeff Flake, who is WEAK on borders, crime and a non-factor in Senate. He's toxic," Trump tweeted in August.

Flake announced he would not run for re-election last month during an interview with the Arizona Republic, and said, "There may not be a place for a Republican like me in the current Republican climate or the current Republican Party."

Flake served in the House for seven terms and was elected to the Senate in 2012.