The Massachusetts Democrat said Saturday that "a line was crossed" by the GOP presidential contender.

GOP presidential hopeful Vivek Ramaswamy did not back down Sunday when questioned about comments he made during a campaign stop in Iowa Friday, calling Rep. Ayanna Pressley (D-Mass.) part of the “modern KKK.”

“I stand by what I said to provoke an open and honest discussion in this country,” Ramaswamy said during an interview on CNN’s “State of the Union.”