MIAMI—Sarah Palin called on fellow Republican governors to keep the new president and his strengthened Democratic majority in check on issues from taxes to health care as she signaled she’ll take a leadership role in a party searching for a new standard-bearer.

Addressing the Republican Governors Association meeting Thursday, this year’s GOP vice presidential nominee—and an oft-mentioned candidate for 2012—revisited some aspects of the bitter campaign and talked about the role of the governors in the coming year. After losing the White House and several seats in the Senate and House, the party is engaging in some soul-searching about its direction.

“We are the minority party,” Palin said at a session on “Looking Towards the Future: The GOP in Transition.” “Let us resolve not to be the negative party.”

Still, she took a swipe or two at President-elect Barack Obama. She said with governors, “the buck stops on our desk. ... We are not the many voting yea or nay or present.” While an Illinois state lawmaker, Obama often voted “present,” a practice the GOP criticized during the campaign.

Palin noted that Congress is led by the likes of House Speaker Nancy Pelosi, Senate Majority Leader Harry Reid and Rep. Barney Frank, and said it was incumbent upon GOP governors to ensure that the federal government doesn’t take over the health care system. She said if Obama and the new Congress “err on the side of excess taxes, we have to show them the way.”

“Let’s reach out to Barack Obama,” Palin said. “Show him how lower taxes provide opportunity for the private sector to grow.”

Palin also displayed a sense of humor, telling the governors at the beginning of her remarks that she wanted to catch them up on the developments in her life since they last met.

“I had a baby, I did some traveling, I very briefly expanded my wardrobe, I made a few speeches, I met a few VIPs including those who really impact society like Tina Fey,” she said to loud laughter.

Republican governors acknowledged that Palin would be a party leader.

“She is somebody who is going to be one of the voices in helping to lead the party in the months and years ahead,” Pawlenty said. “We’re going to need a whole team, but she’s clearly going to be one of the voices that people are going to look to for some perspective on various issues.”