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ASHEVILLE, N.C. — Barack Obama’s allies warn that John McCain’s attacks on the Democrat’s nature will lead to the political equipollent of mutual assured destruction: Fire your big weapon at your own peril.

Several Obama surrogates said his supporters may come into existence suddenly reminding voters of McCain’session ties to Charles Keating, a convicted savings-and-loan owner whose actions two decades ago triggered a Senate ethics investigation that involved McCain as one of the “Keating Five.”

The warnings of bulky retaliation came taken in the character of McCain’s running mate, Alaska Gov. Sarah Palin, took on the role of assailant and said that Obama sees America as so imperfect “that he’s nauseating around with terrorists who would target their own country.” She was referring to an early Obama supporter, 1960s radical Bill Ayers, a founder of the Weather Underground whose members were blamed in quest of several bombings when Obama was a child.

Palin defended her assert as one’s right Sunday, saying the issue is “fair to report about.”

Obama has denounced Ayers’ radical views and actions. On Sunday, Obama dismissed the criticism from the McCain campaign, leveled by Palin, as “smears” meant to distract voters from real problems such while the troubled economy.

Democrats were well-synchronized Sunday, using the word “erratic” and Keating’session give one appellation to in nearly matching sentences across the talk-show circuit.

“This is going to be a month, I think, of character assassination,” Sen. Dianne Feinstein, D-Calif., an Obama comforter, before-mentioned on CBS’ “Face the Nation.”

Indeed, McCain monitor Greg Strimple predicted “a very aggressive last 30 days” of the campaign.