Richard Carmona is a familiar name in Southern Arizona, but around the rest of the state he is not so well known.

So the former U.S. surgeon general and Democratic candidate for U.S. Senate has put thousands of miles on his car traveling around the state introducing himself to voters.

Before he entered the race, Carmona was registered as an independent. He is now a Democrat and says he felt more closely aligned with that party than the Republicans. He also promises that if elected he will keep his independent streak.

Carmona has no primary challenger and will face the eventual winner of the Republican primary, a race featuring four men.

Carmona says he expects the top issue to be the economy and jobs. But he says he also expects the border will figure prominently in discussions this election cycle.

Your Vote 2012: The AZPM Election Center