president franklin roosevelts in internment of japanese in world war ii. >> donald trump is calling for a shut down of muslims entering the united states until our country's representatives can figure out what the heck is going on. >> reporter: campaigning in south carolina last night, trump suggested muslim animosity toward america was widespread and conjured memories of 9/11. >> you're going to have more world trade senors. >> reporter: this morning trump was asked how the ban would work. >> they would ask the religion? >> they would say, are you muslim. >> and if they said yes, they would not be allowed in the country? >> that's correct. >> top republicans like paul ryan were quick to denounce trump. >> this is not conservative. it's not what this party stands for, and it's not what this country stands for. >> reporter: reince peeb us who