"Now, you can count on John and on me to follow through on our promises because we're the only candidates in this race with a track record of reform," Palin, the governor of Alaska, told a Republican campaign rally in Leesburg, Va.

To get the faltering economy back on track, a McCain-Palin White House would impose a spending freeze on all but the "most vital functions of government," said Palin, who offered no specific details.

Palin painted Democratic presidential nominee Sen. Barack Obama, D-Ill., as a big spender who would raise taxes and further crimp the take-home pay of hard-working people.

"Senator Obama has a ideological commitment to higher taxes," Palin said as her audience shouted, "Boo. No-bama. Vote McCain; use your brain."