The Last Word with Lawrence O'Donnell 07/23/13

Tea Party challenging Sen. Mitch McConnell

Senator Mitch McConnell, the top Republican in the Senate, will face a primary challenge from a tea party businessman. MSNBC's Ari Melber discusses with The Washington Post's Nia-Malika Henderson and Kentucky political reporter Joe Gerth of the Courier ... more Duration: {{video.duration.momentjs}}