An influential Republican senator said on Sunday the longer the United States stayed bogged down in Iraq, the more the conflict looked like another Vietnam War, Reuters reported. "What I think the White House does not yet understand and some of my colleagues, is the dam has broken on this (Iraq) policy," said Nebraska Sen. Chuck Hagel, a senior member of the Foreign Relations Committee and possible presidential candidate in 2008. A decorated Vietnam War veteran, Hagel also said the war in Iraq had further destabilized the Middle East and the White House needed to find an exit strategy for Iraq. Hagel's comments on ABC's "This Week," coincide with President George W. Bush's new offensive to counter growing public discontent over U.S. involvement in Iraq and calls for a pull-out date. The White House rejected Hagel's remarks and said it was essential the United States complete its mission in Iraq. --More 0026 Local Time 2126 GMT