Rep. Glenn Grothman, R-Wisc., said that a Donald Trump presidency would be “a very scary thing” when it comes to foreign policy, reacting to Trump’s latest comments to The New York Times that he wouldn’t necessarily honor NATO’s Article V if Russia invaded a NATO member.

“There’s no question in analyzing Donald Trump, the toughest thing to agonize over is what he’s going to do on foreign policy,” Grothman said while speaking today with radio host Charlie Sykes, adding that he was hopeful that vice presidential nominee Mike Pence “would have a lot of influence” in a future Trump administration so that Trump would not endanger global safety.

A dumbfounded Grothman, a Trump supporter, warned that Trump’s suggestion that the U.S. should not abide by its commitments to allies would create a less safe world and invite a Russian invasion of its European neighbors.

“I think you could almost say it’s a very good chance we’re going to see Russian tanks” in Europe, Grothman said.

Sykes noted that if President Obama made the same comments about NATO and the turmoil in Turkey, Republicans would be up in arms.