WASHINGTON — Alaska Gov. Sarah Palin's abrupt and unscripted holiday resignation is an odd way to launch a potential presidential bid and no help for a party battered by scandal and fighting for relevancy.

From a folksy figure who catapulted from obscure governor to conservative darling and vice presidential nominee, it's merely the latest move in a political drama that has left Republican elders scratching their heads.

No one is sure why Palin took such an unusual path. All points suggest a strategy designed to maintain her political viability with an eye toward a 2012 presidential bid. Barring a personal surprise or scandal, little else makes sense.

Even in explaining her exit from the governor's office during the middle of her first term, former aides to Sen. John McCain, R-Ariz., and current allies criticized Palin for what they said was a typically erratic and seemingly irrational act. McCain, who named Palin his running mate in 2008, issued a terse statement wishing her well.

"If this is her launching pad for 2012, it's a curious move," said John Weaver, a former senior strategist for McCain's presidential bids. "Policy is politics, and she has no real accomplishments as governor."

Some party officials, including some once close to Palin, wondered whether she departed in advance of a brewing controversy, an assertion her camp denied. During the presidential campaign, McCain officials fretted about six or seven areas of personal and professional concern, according to a former official who helped investigate Palin's background after her rocky rollout.

This official, who spoke only on the condition of anonymity to discuss internal matters, said the governor's explanations for many subjects never won full acceptance from the campaign, but the stretched-thin McCain staff decided not to pick a fight with the vice presidential pick during the final march toward November.

While the straight-talking former small-town mayor didn't indicate what she would do after she leaves office this month, Palin's rambling exit statement offered clues about her political ambitions.

She says she wants to help Republicans win. That means she could raise money and earn favors for another campaign.

She says she wants to travel. That means she could find her way into high-value political centers such as Manchester, N.H., and Des Moines, Iowa.

She says the media are against her. That suggests she's casting herself as a victim again, a move right out of her campaign playbook.

She says she wants to better serve Alaska by stepping down as its governor. That means she could buck the system and try to wrap herself in the cloak of change that helped Barack Obama win the White House.