Obama keeps hammering Romney on personal tax returns

The Morning Joe panel seems to think this new Barack Obama spot is strong, but it actually seems like a missed opportunity.

It begins by ripping Mitt Romney for his "47%" comments (effective); then ties that riff to Romney's own personal tax rate in what's supposedly a killer link. But instead of being the devastating, final point of a prosecutor's case, it just sounds small, personal, and petty -- like so many of the president's attacks on Romney's tax returns.

The spot will run in Ohio.