I watched Trump on O'Reilly last night. I must admit, I'm taking him a bit more seriously after the last few appearances in which I've seen him. He says convincingly that he's pro life, pro hetero-marriage, and that Obama is a complete and utter failure, with strong articulation as to why, as well as a good grasp on policy matters both foreign and domestic.
Clearly, he's going "all-in" with the birther thing. He's high profile, and has nothing to lose. The American people are increasingly viewing Obama as an outsider, and the number of people who believe he is a Muslim or foreign born is increasing. One thing Trump is accomplishing in my view is a de-stigmatization of those who just want the questions resolved. The Left and the establishment GOP has been very successful at painting those who want a definitive answer as kooks. Trump is articulately countering that effort. Now if you're calling birthers kooky, you're calling Donald Trump kooky. He's a media whore somewhat eccentric egomaniac with crazy hair, but he's been a well-known serious businessman for decades.
Trump will live or die by this tactic. If he yields no smoking gun, he's political toast. If he somehow is shown to be correct, and his determination ends up showing Obama to have been ineligible for the Presidency, I think Donald Trump may well be the next President.