By Mark Hosenball WASHINGTON (Reuters) - U.S. senators on Wednesday called for extensive reforms in the way soccer is run by both international and U.S. governing bodies, and questioned what current U.S. soccer chiefs knew about corruption in the global organization FIFA. "The facts show there had to be either wilful ignorance or blatant incompetence on behalf of many of the members of this organization - that's true of U.S. Soccer as well," said Sen. Richard Blumenthal, the top Democrat on the Senate commerce subcommittee at a hearing it held on Wednesday to examine alleged corruption in FIFA and related soccer bodies. More...