In the 2016 presidential election, Kallstrom supported Donald Trump and has referred to Hillary Clinton and the Clinton family as being criminal-like. He called the Clinton Foundation a "cesspool". Kallstrom has established relationships with Rush Limbaugh and Fox News to further his work to promote the Marine Corps – Law Enforcement Foundation (MC-LEF), a charitable organization of which he is the Chairman of the Board. On Fox News, Kallstrom accused United States Attorney General Loretta Lynch of bias by behaving as if she were part of the Democratic National Committee.
In March 2018, Kallstrom declared on Fox News that both President Obama and former CIA Director John Brennan had committed felonies in trying to keep Hillary Clinton from being indicted. "It goes right to the top, and it involves that whole strategy. They were going to win [the 2016 election], nobody would ever know this stuff, and they just unleashed the intelligence community," Kallstrom continued. Kallstrom was not asked if this was to help Clinton, why the information on the Russian investigation was not leaked to the press prior to the election.
