Lawrence O'Donnell actually uses the "L" word with Rep. John Culberson. This is the end of an over ten minute segment where O'Donnell continually asks Culberson whether he would have voted for Social Security and for Medicare and Culberson gets mad at him for interrupting him, which he does. He interrupts him though because he's trying to avoid giving him a straight answer to his questions.
After finally getting Culberson to admit that he would have voted for both Social Security and Medicare, O'Donnell calls him out for the fear mongering done by Republicans on the issue of health care reform, and tells him they're lying to the American people every time they demonize socialized medicine, but refuse to vote to repeal Medicare.
Culberson obviously wasn't too happy with O'Donnell for both the interrupting or for calling him a liar. His retreat was to attack MSNBC and say no one watches them, and go on the defensive about being called a liar and say that O'Donnell doesn't know him personally.
I hate to break this to you Congressman, but he doesn't have to know you personally to watch you and the rest of the Republicans fear mongering about socialized medicine. Culberson then goes on to prove O'Donnell's point.... by attacking government run health care and more fear mongering.