Obama goes up in Indiana with a new spot that responds to today's Hillary ad hitting him on the gas tax by implicitly questioning her honesty... Interestingly, this ad doesn't mention the gas-tax issue. Instead it returns to the Obama campaign's broader indictment of Hillary's character -- the claim that Hillary is a dirty-politicker who can't be trusted. The ad references a recent editorial in The New York Times -- which endorsed Hillary -- that accuses her of taking "the low road." "We...