He wouldn’t really be hired for his PR skills (which are poor) or his reputation (which is evasive and slippery). He’d be hired for his political connections, like Al Gore was by Google. He’d be hired because the company needs politician friends.
Embarrassing, actually. Though if he could spin Obama’s first two years I’m sure he’ll be able to put the best face possible on FB’s contempt for its users’ privacy as well as its post-IPO valuation plummet after all the insiders cash out.