NEW : Obama says program stimulates economy while getting old cars off road . Senate votes 60 - 37 to expand program with an infusion of $ 2 billion . CNN Senior White House Correspondent Ed Henry contributed to this report . Program allows drivers to turn in gas guzzlers for fuel - efficient models . Lawmakers say program will run out of money without extension .
NEW : Obama says program stimulates economy while getting old cars off road . Senate votes 60 - 37 to expand program with an infusion of $ 2 billion . Program allows drivers to turn in gas guzzlers for fuel - efficient models . Lawmakers say program will run out of money without extension .