Donald TrumpDonald John TrumpKoch-backed group launches six-figure ad buy against Heitkamp Anti-abortion Dem wins primary fight Lipinski holds slim lead in tough Illinois primary fight MORE said in an interview Sunday that Russian President Vladimir Putin isn't going to go into Ukraine, even though the Russian military has intervened in the nation's affairs since 2014. 

"He's not going into Ukraine, OK, just so you understand. He's not gonna go into Ukraine, all right? You can mark it down. You can put it down," the GOP presidential nominee said Sunday on ABC's "This Week." 

Host George Stephanopoulos pushed back, saying, "Well, he's already there, isn't he?"

"OK, well, he's there in a certain way," Trump responded.

"But I'm not there. You have [President] Obama there. And, frankly, that whole part of the world is a mess under Obama, with all the strength that you're talking about and all of the power of NATO and all of this."