Obama is the origin of his troubles,

Back in the day when his publish indicated so and he did nothing to correct it
http://www.snopes.com/politics/obama/birthers/booklet.asp

Then, as president he puts a document that does nothing to quell the issue and makes it worse. There was no reason for a scanned certificate to PDF to have 14 layers in Illustrator. He should have just posted a Jpeg.

Why did Trump did what he did - who knows. But the media did get played that day.

I love Snopes. Of course, the devil is in the details:

"The editor of the biographical text about Barack Obama which was included in the booklet maintained that the mention of Kenya was an error on her part and was not based on any information provided to her by Obama himself:

"Miriam Goderich edited the text of the bio; she is now a partner at the Dystel & Goderich agency, which lists Obama as one of its current clients.

"'You're undoubtedly aware of the brouhaha stirred up by Breitbart about the erroneous statement in a client list Acton & Dystel published in 1991 (for circulation within the publishing industry only) that Barack Obama was born in Kenya. This was nothing more than a fact checking error by me — an agency assistant at the time," Goderich wrote. "There was never any information given to us by Obama in any of his correspondence or other communications suggesting in any way that he was born in Kenya and not Hawaii. I hope you can communicate to your readers that this was a simple mistake and nothing more.'

"A New York Times article about Barack Obama published in 1990, a year before the Acton & Dystel promotional booklet was issued, correctly identified his birthplace as Hawaii.

"A variant of this item paired the image shown above with the statement "Big Oops! Harvard Law Review did not cleanse its 1991 yearbook which states he was born in Kenya." As noted above, the biographical sketch pictured above was put out by a literacy agency; it was not part of any yearbook published by Harvard."

Moving this video to RedSky's personal queue. It failed to receive enough votes to get sifted up to the front page within 2 days.