Katrina Pierson, a spokeswoman for Donald Trump‘s campaign, battled conservative commentator S.E. Cupp Tuesday over the presidential candidate’s recent proposal to ban Muslims from entering the United States, insisting the plan is “really nothing new.” Trump received significant backlash from Democrats and Republicans after releasing a statement Monday calling for the United States to ban Muslims from entering the country. Cupp, who said on a panel earlier today that Trump “will never be president,” labelled the proposal “morally repulsive,” “unconstitutional, and unAmerican.” Pierson told Jake Tapper the U.S .already has “laws on books giving Congress the authority to ban immigration from nations that hostile towards America,” adding “this is really nothing new.” “It’s not ‘nothing new,’” a visibly shocked Cupp said. “There really is something new to the idea of banning an entire religious group from entering the country.” Pierson argued that the United States has never in its history “allowed insurgents to come across this border.” “No one’s talking about allowing insurgents,” Cupp countered. “You’re talking about not allowing regular Muslims.” “Yes, from Arab nations,” Pierson replied. “You know what? So what? They’re Muslim!” “So what?! That’s not the nation we live in, Katrina,” Cupp said.