LOL! Best post on the thread!
I am a "birther". (One who was interested in exploring Obama's eligibility for the office of President.)
I realized when Trump started making noises indicating he was interested in the "birther" question, that this was a feeler into the conservative base. It didn't cost him anything to show a little support to this marginalized group, but they would likely remember it.
That's when I realized he was probably going to run for President.
The man is shrewd. He is a lot more clever than his enemies presumed.