MSNBC host Ali Velshi allowed House Majority Whip Jim Clyburn, D-S.C., to share discredited claims that a longer waiting period to buy a gun would have prevented Dylann Roof from committing the Charleston massacre in 2015.

MSNBC host Ali Velshi allowed House Majority Whip Jim Clyburn, D-S.C., to share discredited claims that a longer waiting period to buy a gun would have prevented Dylann Roof from committing the Charleston massacre in 2015.