(Acknowledging that whether or not anyone has the guts to prosecute him is another matter!)
I don’t know about what charges could be filed against him. But over the last couple of months I’ve noticed quite a few articles in the LMSM about the nature of sociopaths & psychopaths. Almost as if the fawning media was greasing the skids for him to step down due to mental illness, if it was revealed that he was either a serial liar or an identity thief.
There is a five year Statute of Limitations on any crime, such as fraud, that Obama might be charged with. The Statute of Limitations proceeds from when the crime was committed.