CHARLES KRAUTHAMMER: [Donald Trump] couldn't resist the temptation to be the smart ass and to show that he's clever. Look, the pride he has is his success. That's how he defines himself, and he wasn't ashamed to admit that he could have done this. He was actually conceding that he may not have paid any income tax. Now, in a boardroom with a bunch of other CEOs and you're boasting about your success, you say that. You don't say it in a presidential campaign. Whereas Hillary said today, if it's smart not to pay any taxes and you're a billionaire, well what about the rest of us? And I think this thing could have legs, first concession that he may not have paid taxes. 

Previously: 

Presidential Debate Moderator Lester Holt Asks Trump To Justify Not Releasing His Tax Returns

Here Are All The Reasons Media Think Trump Is Not Releasing His Tax Returns

Watch Trump's Campaign Manager Dodge Questions About Tax Returns

CNN's Jeffrey Lord: Trump Shouldn't Release His Tax Returns Because People Will Ask Questions About Them