House Democratic leaders announced they had reached an internal compromise on their aptly named "Cash for Clunkers" plan. The legislation would give consumers up to a $4,500 rebate to turn in cars or light-duty trucks that get less than 18 miles a gallon and purchase a new car with a "window sticker" rating of at least 10 miles a gallon more than their old car. $3,500 would be available if the rating was at least 4 miles a gallon more than what was traded in.