The most positive campaign evah is out with a new ad that “wonders” if Mitt Romney “paid any taxes at all.”

From the voice-over:

Tax havens. Offshore accounts. Carried interest. Mitt Romney has used every trick in the book. Romney admits that over the last two years he’s paid less than 15 percent in taxes on $43 million in income.

Makes you wonder if some years he paid any taxes at all.

Obama supporters aren’t saying Romney didn’t pay taxes. They’re just “asking questions.”

Well, there’s a lot about President Transparency that makes you go “hmm,” so conservatives are pushing back with the #makesyouwonder hashtag. National Review’s Jim Geraghty got the ball rolling.

Hey, we’re just wondering. And that’s not all that makes the right side of the Twitterverse wonder.

Team Obama has tried desperately to portray Mitt Romney as a secretive, shady character whose campaign is driven by “clandestine” meetings, “shadowy” money, and “secret gatherings of billionaires.” All while the president invokes executive privilege to hide Fast and Furious documents, covers up his ties to criminals and terrorists and quietly lines the pockets of big donors.

Makes you wonder.