“Angola has frozen the assets of the billionaire Isabel dos Santos, daughter of the country’s former leader, in a move, indicating that incumbent President João Lourenço is aiming at tougher stance against the former first family. Angola hits 'Princess' dos Santos with asset freeze https://t.co/5hGZTHuQlK — Reuters Africa (@ReutersAfrica) January 1, 2020 “Since closing the…