He can...
So, what would he do? How would he get out of the country? Take an official visit and then claim asylum? That would be an international incident of the first order (not that he would care).
Then we would have Biden, followed by Pelosi. Those two would have to explain why they didn’t spot this nefarious plot, along with Hillary Clinton and the CIA and FBI.
The result would be the destruction of the democrat party, probably riots in urban areas, forced resignations of all Obama appointees, impeachment of Biden, and, as my friend Kratos says on another site:
“In the end, there will only be chaos.”