Former President Donald Trump put U.S. troops “in greater danger” by suggesting that he might encourage Russia to attack some European allies, according to the U.S. envoy to NATO.

“Well, look, encouraging the Kremlin to attack any NATO ally or alliance territory really puts our soldiers, U.S. soldiers, and our allies’ soldiers in greater danger,” Ambassador to NATO Julianne Smith told reporters Tuesday. “Doing so, making those types of statements, is dangerous and, frankly, irresponsible.”