Trump was asked to clarify a comment he made in a recent news conference indicating he was looking at whether Crimea should officially be considered Russian territory.
At the news conference, Trump said he "would be looking at" the possibility of lifting sanctions against Russia tied to its annexation of Crimea, which the U.S. government refuses to accept.
"He's not going into Ukraine, OK, just so you understand," Trump said on "This Week." "You can mark it down. You can put it down.”
Asked further about Russia's current presence in Ukraine, of which Crimea is part, Trump then acknowledged Russia was already in Ukraine "in a certain way."
Trump pushed back against accusations that he is too easy on Putin, saying that if he's elected and the U.S. gets along with Russia, "that would be a great thing."
"When Putin goes out and tells everybody, and you talk about relationship, but he says, 'Donald Trump is gonna win. And Donald Trump is a genius.' And then I have people saying, 'You should disavow,'" Trump said. "I said, 'I'm gonna disavow that?' But when Putin says good things, and when we have a possibility of having a good relationship with Russia, I think that's good."
"If we can have a good relationship with Russia, and if Russia would help us get rid of ISIS, frankly, as far as I'm concerned, you're talking about tremendous amounts of money and lives and everything else," Trump added. "That would be a positive thing, not a negative."
On "This Week," Trump said repeatedly that he has "no relationship with Putin," adding that he’s never met him in person or spoken on the phone, and that he has no business ties or debts to Russia.
"He was saying very good things about me. But I don't have a relationship with him," Trump said. "I didn't meet him. I haven't spent time with him. I didn't have dinner with him. I didn't-- go hiking with him… I wouldn't know him from Adam except I see his picture, and I would know what he looks like."