WASHINGTON (AP) - Backers of the "cash for clunkers" have picked up three new Senate supporters, including a Republican as dicussions on a $2 billion extension continue.
The auto incentive program could run out of money Friday an this is the final week of the Senate session before vacation.
Senate Democrats are struggling to win over enough reluctant Republicans to approve the program.
Data released by the administration shows the new vehicles purchased under the program were 61 percent more fuel efficient than the trade-ins.
That helped sway Democrats Dianne Feinstein of California and Chuck Schumer of New York, and Republican Susan Collins of Maine.
The White House says the incentives are unlikely to continue into the weekend if the Senate fails to approve the extra funding already passed by the House.
Carmakers say the program has helped boost sales.