WASHINGTON (AP) - A major highway and transit spending bill stalled Wednesday in the House as Republican leaders tried to deal with a presidential veto threat and disunity within their ranks. A two-hour closed-door meeting among House Republicans failed to clear up differences over the six-year, $275 billion bill, casting doubt over whether it would come for a vote before the House leaves for a two-week spring recess at the end of this week. The legislation, which would spread infrastructure projects around the country and create hundreds of thousands of jobs, is a top legislative priority this year. But it...