Fame
Some political campaign managers go on to be well-known (just like ol' what'shisname), but for the most part, your place is in the background so your candidate can have the spotlight. The kind of fame you do want comes from within the political field, as your history of victories builds you a reputation as a winner.
But be careful about putting fame ahead of integrity; that tell-all behind the scenes memoir might net you a million dollars, but is it worth forfeiting your good name and career? If you still want to cash in on your knowledge, there's always the lucrative world of talking heads on news channels, or breaking into the news arena, like George "I Dare You To Spell My Name" Stephanopoulous.