A Super PAC that's backing Mitt Romney is airing an attack ad that a public policy professor says is beyond misleading. But Rick Santorum, the target of that ad, has responded with his own attack ad that also stretches the truth.
As voters in New Hampshire cast ballots, they're being inundated with advertising that seems to support one candidate or another, but which is actually paid for by "independent" Super PACs, political groups that can raise and spend virtually unlimited amounts of cash on political issues.