That's what several witnesses are saying. By the way, here's some background on Broun from a reader:

Just google this Broun idiot.  Looks like he has used some very inflammatory language regarding Obama.  He was the congressman who sat out the SOTU so he could sit in his office and tweet about what a big socialist Obama is.  He was one of the first to compare Obama to Hitler and Marx (yes, both) and claim that Obama wants to build a paramilitary force answerable only to him.  He also likes to call the Civil War the "War of Northern Aggression."  So, small wonder that reports from yesterday's town hall is that the question, "Who is going to shoot Obama?" drew a hearty laugh from the crowd in attendance.  (I pray there is video.)

Oh, almost forgot the best part: Broun is your new chairman of the Science and Technology subcommittee.  He plans to use that chair to help prove that climate change is all a hoax.

Think Progress has countless posts on the radical congressman. There is a difference, however, between radical politics and this kind of a response to a demand to assassinate the first black president of the United States. He needs to resign.