Did Mitt Pay Zero Taxes in 2009?

Romney has acted very suspiciously with regard to his tax returns, and there may be some very logical reasons why. As David Schuster surmises, Mitt may have paid zero in federal taxes in 2009:

SHUSTER: Actually, Governor, if you think a limited release is going to put this issue behind you, you're politically tone-deaf. First, your 2010 return indicates you paid a rate of 13.9 percent. Furthermore, it suggests you paid far lower than that in 2009. You see, the 2010 return reveals you carried over $4.9 million dollars in losses from the previous year. That means you paid no taxes on capital gains in 2009, including no taxes on your carried interest.