Donald Trump's David Duke Problem: Republicans, Democrats Blast Billionaire Over His White Supremacist Supporters

Both Republican and Democratic presidential candidates seemingly agreed Sunday that GOP front-runner Donald Trump shouldn't be the commander-in-chief if he can't forcefully condemn the Ku Klux Klan and other white supremacist groups whose members have endorsed him. But Trump said he has disavowed support from such groups even though he claimed to be unfamiliar with them in an interview on CNN's "State of the Union."