Story highlights "One thing we know about President Trump is he does jab back," Collins said

Trump was criticized for attacking London's mayor following the weekend's terrorist attack

(CNN) A staunch supporter of President Donald Trump said Tuesday that it was London Mayor Sadiq Khan, not Trump, who sparked the feud between the two leaders.

"I could argue the mayor started it months ago," Rep. Chris Collins, R-New York, told CNN's Alisyn Camerota on "New Day" Tuesday. "Let's just say they are not friends. They are, you know, adversaries to the standpoint of jabbing at each other."

"One thing we know about President Trump is he does jab back," Collins added.

Donald Trump Jr. also came to his father's defense Tuesday morning, saying despite the criticism, his father's tweets are right, casting blame on Khan.

"Every time he (President Trump) puts something out there, he gets criticized by the media all day every day and by everyone else, and guess what, two weeks later he's proven to be right. (Terrorism) happened again and we keep appeasing it and we keep saying OK, it's going to be great," Trump Jr. said in an interview with ABC News.

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