Senate Commerce Committee Chairman Sen. John Rockefeller, D-W.Va., questions witnesses during the committee's hearing on Toyota, Tuesday, March 2, 2010, on Capitol Hill in Washington. (AP Photo/Manuel Balce Ceneta)

Senate Commerce Committee Chairman Sen. John Rockefeller, D-W.Va., questions witnesses during the committee's hearing on Toyota, Tuesday, March 2, 2010, on Capitol Hill in Washington. (AP Photo/Manuel Balce Ceneta)