President Bush and congressional Democrats are in a new spending dispute on Capitol Hill. On Tuesday, Bush vetoed a $600 billion bill to fund education, health and labor programs. Bush says the bill contained too many earmarks for unrelated projects. Meanwhile, Senate Majority Leader Harry Reid announced Democrats will no longer approve any funding for the Iraq war unless Bush agrees to a timetable for the withdrawal of combat troops by the end of next year. Reid issued the warning as Bush signed a Democrat-approved $460 billion spending bill boosting the Pentagon’s budget by more than 9 percent.