Name: 'Black lives matter' protest may show Sanders' weakness
Uploaded: Tue Jul 21 2015 01:23:00 GMT+0000 (UTC)
Duration: 9 min 2 s
Description: Karen Tumulty, Washington Post national political correspondent, talks with Steve Kornacki about whether Bernie Sanders can attract enough of the black vote to keep his campaign viable or if his being heckled by #BlackLivesMatter protesters is a bad sign.

July 21, 201509:02

Sanders vulnerability seen in narrow base