Associated Press: General Motors CEO Rick Wagoner said Tuesday the automaker is committed to meeting tighter fuel efficiency requirements as he met with House and Senate leaders who could play a role in developing global warming legislation. Wagoner was on Capitol Hill to meet with Rep. Henry Waxman, D-Calif., and Sen. Jay Rockefeller, D-W.Va. The two Democrats recently took control of committees with jurisdiction over the auto industry. Even in its weakened shape, GM has “prioritized all the …