Clash at IRS hearing

Wednesday, 5 Mar 2014 | 7:16 PM ET

A House hearing investigation into the IRS targeting conservative groups broke into a heated argument between Chairman Darrell Issa (R-CA) and Rep. Elijah Cummings (D-MD) moments after former IRS official Lois Lerner once again invoked her Fifth Amendment right, reports CNBC's Morgan Brennan.