Is Sarah Palin the answer the Republican Party is looking for?

Not likely. Palin's abrupt announcement that she's quitting as governor of Alaska may be part of a long-term strategy that leads to the Oval Office. But at the moment, it looks more like the impulsive act of a hot-headed politician who can't abide criticism -- poor attributes for anyone who hopes to run for president.

Take Palin at her word: She decided to quit because she didn't think she could get much done for Alaska in her remaining 18 months in office, beset as she was with ethics charges that never seemed to go away.

She quit, in short, to cut her losses while she could still plausibly claim to be ahead.

She says she still wants to have national impact, and she promises to campaign for candidates around the country who share her ruggedly conservative views: "I'll work for and campaign for those proud to be American, and those who are inspired by our ideals and won't deride them."

She looks and sounds, well, like Sarah Palin, but she also looks and sounds like a politician who wants another turn on the national stage.

Palin's main asset, of course, is a base of fervent support among social conservatives who see her as fresh, exciting and embattled -- the people who responded to her resignation by sending contributions to her fundraising committee, SarahPAC.

The problem for Palin and her party is that she doesn't have what Republicans need most: an idea.

For the last half-century, the GOP has prided itself on being the "party of ideas," a coalition that constantly invented new ways to apply its basic principles -- smaller government, lower taxes and an assertive foreign policy -- to the nation's problems.

Under George W. Bush, the string of successful ideas ran out. In 2008, it was the Democrats of Barack Obama, not the GOP, who won by proposing a detailed agenda of new policies and new initiatives.

In Congress, a notably uncharismatic collection of Republican leaders continues to reaffirm the ancient tenets of their faith: Government spending is bad, and taxes should be reduced. But that won't add up to a winning national platform unless Obama turns out to be a miserable failure and voters reflexively turn the other way.

Hence the search by many Republicans for an attractive idea or two. In 2000, Bush won votes from independents and centrists by proclaiming himself a "compassionate conservative," a governor who reformed his state's education system even as he kept a close eye on the purse strings.

And Palin? A voter interested in her approach to national issues will look in vain for new ideas. Her 18-minute statement on Friday introduced a new aphorism to American politics: "Only dead fish go with the flow." But it offered no priorities for Alaska or the nation beyond a handful of broad-brush goals: "Energy independence and smaller government and national security and freedom."

In her 2008 vice presidential campaign and since, she has been a champion not so much of ideas as of attitudes: anger at the national media, fear of a "big-government takeover," and the charge that unnamed liberals (presumably including Barack and Michelle Obama) "deride" American ideals. Those aren't ideas; they're slogans.

Palin may have the recipe for winning the hearts of the 37 percent of Americans who describe themselves as conservatives, but it won't attract votes from the 38 percent who call themselves moderates -- and who remain the key to any presidential election.

Which brings us to Palin's second flaw as a national candidate: She's a polarizer, not a unifier.

Bush, now remembered as a polarizing president, won the White House twice by tempering his conservatism just enough to win a hearing from independents. Palin knows no such urge. It is easy to imagine her winning an Iowa caucus, where the Republican electorate is dominated by social conservatives, but almost impossible to imagine her winning a primary in New Hampshire or Michigan, let alone a general election in 50 states.

And there's a third flaw.

Republicans prize another old-fashioned virtue: steadiness. The GOP likes to think of itself as the party of solidity, orderliness and competence. Republicans often win governor's seats in otherwise Democratic states simply by promising to run the government better than liberals can.

That's where Palin's abrupt career change last week will hurt her in the long run: It has confirmed Republicans' sense that she's not merely a "maverick" -- an attribute the party never prized much anyway -- but a flake.

"She seemed more like a spoiled celebrity than a serious public official," former Bush aide Michael Gerson said on PBS. "She's now becoming more of a kook than a serious candidate," former Ronald Reagan campaign manager Ed Rollins said on CNN.

Republicans sometimes say they're looking for another Reagan: a full-fledged conservative with serious government experience who can make their party's creed not just nonthreatening but downright attractive to most voters. But Sarah Palin, as she demonstrated on Friday, is no Ronald Reagan.

• Doyle McManus is a Los Angeles Times columnist.

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