1. His mother's ininerary between finishing HS and her death
2. The years Obama was an Indonesian citizen. Is he still?
3. All applications and transcripts.
4. Testing scores
5. Obama's DNA.
Trump is correct as is often the case. Hackers could get all of this, and the DNA should be obtainable. Without these things, all of the research will continue to be ignored.
“5. Obama’s DNA.”
They are still collecting and testing dinosaur DNA, so maybe someday it will happen.