CRAWFORD, Texas (Reuters) - Iraq war protester Cindy Sheehan, whose vigil near President George W. Bush's Texas ranch has become a symbol for the anti-war movement, said on Friday she plans to focus on Congress, starting with House Majority Leader Tom DeLay, a Bush ally and fellow Texan. Sheehan has been demanding a meeting with Bush to discuss the U.S. presence in Iraq, where her son was killed in 2004. She plans to begin a bus tour next Thursday from Bush's ranch to the White House to campaign for the withdrawal of American troops from Iraq. One of DeLay's Texas...