Jim Kelly said President Donald Trump stood by his family while he was undergoing cancer treatments. (Buffalo News file photo/Harry Scull Jr.)

Donald Trump has Jim Kelly's support.

The Buffalo Bills' Hall of Fame quarterback explained why during an appearance on Fox Business' "Varney & Co." this week.

Host Stuart Varney asked Kelly if he supported our country's new president, and Kelly indicated that he does.

"When I was going through my cancer fight ... he provided my family and friends with a place to stay, his apartments. He took care of my whole family," Kelly said of Trump. "Donald did that for my whole family. There were days when I would come to New York City. I'd give him a call, and I'd go up and we'd sit there and shoot the bull, have a little fun."

Kelly and Trump have known each other for more than 30 years, dating to when the quarterback played for the Houston Gamblers of the United States Football League. Trump owned the New Jersey Generals at the time, and purchased the Gamblers after the 1985 season. The league folded before Kelly would ever play for Trump.

"Everybody has their personal opinions," Kelly said. "I'm not here to say yes or no, but yes, I like Donald. He's been very good to my family. We all make mistakes and I'm sure he's made a few, but I'm happy for him."

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Kelly appeared on the show to promote the promotional campaign he has developed with pharmaceutical company Merck and various cancer organizations. Titled "Your Cancer Game Plan," the campaign stresses the importance of maintaining a positive attitude in the face of a cancer diagnosis.

"I’m sitting here today and being able to talk about it," Kelly said, "and, hopefully, be a difference maker for others out there -- that you don’t want them to give up.”

The complete video of Kelly's appearance is below:

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