Sen. Mark Warner Mark Robert WarnerFBI director casts doubt on concerns over mail-in voting fraud Democrats call for declassifying election threats after briefing by Trump officials It's time to upgrade benefits MORE (D-Va.) on Sunday cautioned against "the types of tweets the president has put out" after Saturday’s London attacks.

During an interview with CNN’s “State of the Union,” Warner argued that one reason the United States has not experienced the same types of attacks as the United Kingdom is because of its ability to integrate immigrants into society.

“I believe in many ways the Muslim-American community is better integrated into our society. I think that’s always been our secret sauce in America, that you can come here first-generation and, if you accept our laws and rules, become American,” Warner told host Jake Tapper.

“That has not always been the case in so many of the European countries, and I think we are seeing again the benefits of that and that’s why it troubles be so much to see the kind of, the types of tweets the president has put out in the last 12 hours or so.”

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Warner, the ranking Democrat on the Senate Intelligence Committee, was referring to comments from President Trump in which he renewed support for his travel ban, called for an end to political correctness and criticized London Mayor Sadiq Khan.

Warner added that the United States does not have the same problem that Prime Minister Theresa May says the United Kingdom has in tolerating extremism.

“I think we don’t have it the same way as the U.K., but it is obviously a challenge in modern society to maintain free societies and freedom of speech but still recognize that we have to be on guard against some of the hateful venom that is often times spewed over the internet,” he said.