WASHINGTON - JULY 17:  Senator John Warner (R-VA) walks into an elevator near a bust of former Senator and Vice President Spiro Agnew, at the U.S. Capitol on July 17, 2007 in Washington DC. The Senate is working all night before voting on an amendment to the Defense Authorization Bill, introduced by Sen. Carl Levin (D-MI) and Sen. Jack Reed (D-RI), which will require the start of withdrawing U.S. troops from Iraq in 120 days. Getty Images logo Getty Images 59 months ago

WASHINGTON - JULY 17: Senator John Warner (R-VA) walks into an elevator near a bust of former Senator and Vice President Spiro Agnew, at the U.S. Capitol on July 17, 2007 in Washington DC. The Senate is working all night before voting on an amendment to the Defense Authorization Bill, introduced by Sen. Carl Levin (D-MI) and Sen. Jack Reed (D-RI), which will require the start of withdrawing U.S. troops from Iraq in 120 days.