"Of course he's showing it now! It's been three years, it'd take them at least that long to make the best forgery of all!"
So, basically, what's happened is he gave the Birthers what they asked for and now they're more sure than ever that he wasn't born in the USA.
And you know what's fucking hilarious? He could have been born on the moon and could still hold the office of the President. Article 1, Section 8, Clause 4 of the United States Constitution states that Congress shall have the power:
To establish an uniform Rule of Naturalization, and uniform Laws on the subject of Bankruptcies throughout the United States;
Obama's mother was a citizen of the United States and that alone makes Obama an American citizen. But don't bother waiting to hear that bit from the Birthers.