What has Thune shown you? I like him too he seems like a family man and very wholesome, but would vote for him based on his advancement of conservatism.
So far President Obama has shown exemplary "family values" in personal life or else has been successful at hiding any deviance.
That said, he never ran on a "family values" campaign and did not exploit the checkered marital history of John McCain. Obama needs not sell many people on liberalism to be successful in winning re-election. GOP-style Conservatism will be a harder sell in 2012 than most conservatives think.