AP Photo/Andrew Harnik, File
Donald Trump.
The comments came in an interview with Fox News host Sean Hannity about the terrorist group ISIS in an interview airing Thursday night at 10 p.m.
"We have evil that lurks around the corner without the uniforms," Trump told Hannity, a top supporter of his.
"Ours is harder because the people we're going against they don't wear uniforms. They're sneaky, dirty rats and they blow people up in a shopping center and they blow people up in a church. These are bad people."
He continued: "When you're fighting Germany and they had their uniforms, and Japan and they had their uniforms and they had their flags on the plane, and the whole thing."
But Trump is optimistic about America's chances against the terrorist group he has vowed to defeat.
"We are fighting sneaky rats right now that are sick and demented," Trump said. "And we're going to win."