President George W. Bush, who has never vetoed legislation, said on Thursday he was ready to do so this year if the U.S. Congress approves too much government spending. "I'm fully prepared to use the veto if they overspend," Bush told a news conference. Speaking as it was announced that the U.S. budget deficit would hit $337 billion this year, Bush also said he would welcome legislation to discourage the use of "earmarks," or targeted spending that lawmakers often use for pet projects in their districts. Such measures are often added in secret to spending bills. Bush touted a five-year...