Republican presidential candidate Donald Trump, who appeared on "FOX & Friends" Monday morning, said the NFL players protesting during the national anthem should move out of the country.

"Well, I think it's a lack of respect for our country," Trump said. "I think it's a lack of appreciation for our country, and it's a very sad thing. I've never seen anything quite like it, actually. You know, you are talking about a major sport, maybe the major sport, and when you see that and it leads to a lot of other things. I think it's a great lack of respect and appreciation for our country and I really said they should try another country, see if they like it better. See how well they'll be doing. See if they are going to be making $20 million being a second-string quarterback."

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Many wondered heading into the 15th anniversary of 9/11 whether NFL players would still demonstrate a protest during the national anthem, and the answer was yes. While no one sat down like Colin Kaepernick did during the third week of the preseason, many decided to take action in other ways.

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On Thursday, Broncos linebacker Brandon Marshall took a knee during the anthem. On Sunday, the Chiefs' Marcus Peters held his fist up while members of the Titans and Patriots did the same. Four Dolphins players kneeled, and the Seahawks were united in locked arms throughout the anthem. The 49ers play Monday night, where Kaepernick is expected to kneel, which he did during the fourth preseason game.

Roundup of #NFL players participating in protests on Sunday. pic.twitter.com/ToDpZYod7z — Jordan Heck (@JordanHeckFF) September 12, 2016

With the protest spreading, and gaining more attention, more and more people are being asked to give their opinion on it.

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When discussing his reasoning for the protest, Kaepernick — the second-string quarterback in question — mentioned the presidential candidates as a reason for why America is in the situation it is in.

"I think the two presidential candidates that we currently have also represent the issues that we have in this country right now," Kaepernick said. "You have Hillary [Clinton], who has called black teens or black kids super predators. You have Donald Trump, who is openly racist."