"The President has no authority to unilaterally attack Iran and ... if he does, as foreign relations committee chairman and former chairman of judiciary, I will move to impeach him."
Senator Joe Biden
"Biden said he is meeting with constitutional law experts and plans to send Bush a legal memo formally outlining his warning."
Biden drops the ‘I’ bomb
Biden: Impeachment if Bush bombs Iran (Video)
Biden Puts Impeachment on the Table
Lots of Breaking Impeachment News
Joe Biden Iran Impeachment Bush News Politics
