It could just be a publicity stunt (which it most likely is), but Donald Trump, who seriously considered running for president back in the Spring, writes in a new book that the idea of President Trump isn't completely off the table just yet.
Trump also says he hasn't ruled getting into the race later, and recently added especially if Republicans choose the "wrong candidate."
I'd be interested to know who Trump considers to be the "wrong candidate," especially considering the billionaire has already declared the Obama Presidency as a total disaster.