03/28/2008 02:46 am ET Updated May 25, 2011

Obama May Not Release Pre-2006 Tax Returns

Sen. Barack Obama, D-Illinois, released his 2006 tax returns last year. This year his campaign has been hammering Sen. Hillary Clinton, D-NY, for not doing the same, especially after she loaned her campaign $5 million.

But it's not as though all Obama's returns from his entire time as a US Senator are available. Will Obama release all of those returns or, next month, his 2007 tax returns? That's unclear.

So when the Obama campaign says Clinton should release her returns, it just means for 2006? Apparently so.

Read more on ABC's Political Punch