Despite revelations Wednesday about South Carolina Gov. Mark Sanford's infidelity and use of a taxpayer-funded trip to visit his mistress in Argentina, a majority of the state's voters think Sanford is "about as ethical" as most politicians.

Just 18 percent said Sanford was less ethical, according to a poll conducted June 25 by Rasmussen Reports. South Carolina voters apparently do not have high expectations for their elected officials: a third agreed that most members of Congress and governors have extramarital affairs, 42 percent were unsure and just a quarter disagreed.

Rasmussen found a lower number of voters - 46 percent -- saying Sanford should resign than other recent polls. Sixty percent of respondents to a Survey USA poll conducted June 24 believed the governor should step down. In the Rasmussen poll, 39 percent opposed Sanford's resignation and 16 percent were unsure.