Rep. Barbara Lee justified calling President Trump's new chief of staff, former Marine Gen. John Kelly, an "extremist" by pointing toward his policies during his tenure as secretary of homeland security.

"What I'm talking about is his tenure as homeland security secretary and the very extreme policies of promoting family dislocation, deportation of innocent men, women and children, breaking up families, promoting a Muslim ban, promoting a wall between the United States and Mexico. Those are extreme policies," the California Democrat told CNN's Jake Tapper on Sunday.

She added: "So, this is very troublesome to me, to have this kind of power centralized in the White House because these are very serious matters and extreme policies."

On Friday afternoon, she called Kelly an "extremist" after the former homeland security secretary was named to replace Reince Priebus in the White House.

"By putting Gen John Kelly in charge, Pres Trump is militarizing the White House & putting our executive branch in the hands of an extremist," said Lee in a tweet.

Kelly, who starts in his new position on Monday, has a long military background — something Lee said she respects.

"I come from a military family. My dad served in World War II and Korea, and so I respect and honor the military, and recognize the sacrifices that all of our military men and women make, as well as Gen. Kelly and his history and his sacrifices," she told Tapper.