WASHINGTON -- The United States is losing credibility in Europe because of the situation in Iraq and must quickly repair the damage or face eroding support for the fight against terrorism, lawmakers said Sunday."If you were president of the United States and I were your secretary of state, I'd say, 'Get on the plane now, go to Europe. This is a time to unite, unite Europe,'" Sen. Joseph Biden, D-Del., told the host of ABC's "This Week.""And if you continue to lose Europe, you're jeopardizing my country," said Biden, the top Democrat on the Senate Foreign Relations Committee.Strains in...