The State Department does not immigration files. Immigration files are in the custody of DHS. There has been only one case where evidence could have been subpoenaed. Obama ignored all requests for documents in the Georgia Ballot Challenge. Zero prosecutors, Federal or State, have filed criminal charges against Obama for falsely stating he is eligible to be POTUS. And zero prosecutors have demanded to see Obama’s immigration file.
In U.S. v. Craig, the 10th Circuit Court of Appeals held no one has right to a determination as to natural born citizenship status. SCOTUS has opined in some cases a particular individual with particular circumstances is a natural born citizen, but they did not have a right to demand a determination of their status. SCOTUS has only commented on natural born citizenship status in dicta.
SCOTUS has opined naturalized U.S. citizens are not eligible for POTUS. Consequently, the only way to determine who is eligible for POTUS is to eliminate those who are not eligible. Naturalized citizens are not eligible. Non-citizens are not eligible. People under 35 years of age are not eligible. And People who have not been a resident of the U.S. for 14 years are not eligible.
Nothing that you wrote changes the fact that immigration records are among the most accessible of federal records. The release of Barack Hussein Obama Senior’s complete immigration file is evidence of that.