Demand for fuel-efficient cars puts pressure on Congress.

WASHINGTON - With voters clamoring for relief from sky-high gas prices and facing long waits to buy hybrid cars, bipartisan legislation to increase production of fuel-efficient vehicles and alternative fuels is gaining momentum. More than a quarter of the Senate, including five potential presidential candidates, and 84 House members are pushing for a vote on "vehicle and fuel choice" measures that are supported by an unusual alliance of conservative and liberal groups.