The vacation, amid diplomatic talks on oil industry expansion, is a measure of how hard it is to tell where the interests of government end and those of the Trump family begin.
The Phoenix 2 in Zadar, Croatia, in 2023. The craft is said to belong to the petrochemical magnates Ercument and Ruya Bayegan. Ms. Bayegan’s energy company stands to benefit from any increase in Libyan oil production.