Republican presidential nominee Donald Trump fired back at San Francisco 49ers quarterback Colin Kaepernick Monday over not standing during the national anthem.

During a radio interview with Seattle-based radio host Dori Monson, Trump said that he wasn't a fan of the move, saying Kaepernick should "find a country" that would suit him better.

"I have followed it, and I think it's personally not a good thing. I think it's a terrible thing," Trump told the host. "Maybe he should find a country that works better for him. Let him try. It won't happen."

The GOP nominee also continued critique of former Rep. Anthony Weiner after Huma Abedin, his wife and a top aide to Hillary Clinton, announced their separation Monday morning. Trump called him a "sick person," adding that he isn't sure if people like Weiner can "get cured" of what ails him.

"In the case of Anthony Weiner, she's married to a guy that is a uncontrolled and uncontrollable. He's a sick person and she has access to classified information. Huma Abedin has access to classified information. How Hillary got away with that one, nobody will never know," Trump said. "To think that it's very likely much of this information Anthony Weiner would know about. I think it's something that was terrible. At the same time, knowing Weiner, I think Huma Abedin did a very, very smart thing when she finally decided to leave him. Very smart. She had no choice."

"He's a sick person, he's a sick puppy, and so it just happened and it's actually sad in many ways," Trump continued. "He's a very sick guy, and I said if you look back, you'll see that I said at the beginning the worst thing she can do is marry this guy. I've known him for quite a while and I understood that he had difficulties."

"I don't know if these people get cured, it doesn't seem like it," Trump said. "For him to have — in this position that he's in, to have done it again, and this time with a baby at his side, a little baby at his side, is hard to comprehend."