Download | play 
Download | play (h/t Heather)
On Tuesday's Hardball, Senator Joe Biden appeared with Chris Matthews and talked about the new NIE report that showed Iran had halted its nuclear weapons program in 2003. Biden said last week that if the president chose to bypass Congress and invade Iran he would immediately call for his impeachment.
Biden stood behind those comments today, saying they were a warning to President Bush and that he has no constitutional authority to take us to war without congressional approval.