Diplomatic immunity is the inability for someone visiting as a diplomat, which would include a US president visiting another country, to be held to a crime or civil penalty, with countries welcome to expel them for abusing this. I don’t think that applies.
But a US president who is also a felon could technically be denied correctly by immigration officials, but could reach out to the prime minister to get this fixed, probably in advance.
Diplomatic immunity is the inability for someone visiting as a diplomat, which would include a US president visiting another country, to be held to a crime or civil penalty, with countries welcome to expel them for abusing this. I don’t think that applies.
But a US president who is also a felon could technically be denied correctly by immigration officials, but could reach out to the prime minister to get this fixed, probably in advance.