The conventional wisdom says political parties should avoid contested primaries because they could weaken support for the eventual nominee.
In the race for Pennsylvania governor, Democrats are fielding four candidates Tuesday and front-runner Tom Wolf has been taking hits from others on the ballot.
It's unclear, though, whether the image of the soft-spoken York businessman has been tarnished by attacks from two of his three opponents unleashed in the final weeks of the campaign.
Former Gov. Ed Rendell says the high-profile Democratic primary he won in 2002 was the best thing that ever happened to him. Rendell went on to serve two terms as governor.
Wolf has responded to his critics not by counter-attacking them but by likening their strategy to the kind of politics that regular Pennsylvanians dislike.