Donald Trump and certain members of the Tea Party
President Obama not being born in the U.S.
Flashback: Donald Trump questioning whether Barack Obama was born in the United States. [Ridiculousness/Smear by Donald Trump]
If Donald Trump really wanted to know the truth, all that needed to be done was for him to: (a) keep quiet at the beginning (so as to not tip-off any conspirators that would forge any type of document of proof), (b) go to the Hawaii Vital Records office, (c) open a baby-blue government binder and see for himself that Barack Obama was born in Honolulu, Hawaii.  For further confirmation he could: (d) go the Hawaii State Public Main Library, (e) Ask for Microfilm of Newspapers for 1961, and see Barack Obama's birth announcement in the Honolulu Advertiser (morning newspaper), and Honolulu Star Bulletin (evening newspaper).
However, because Trump made this issue a national spectacle for many years , Trump can conveniently accuse the Hawaii Vital Records office of having the time to forge their computer generated printout; or accuse the Hawaii State Library of having the time to forge their newspapers - which is nonsense.
Barack Obama was born in Honolulu, Hawaii in 1961 and in truth, Trump kept up this birther issue because he wanted the vote from the Tea Party.