The Hollywood actor is a prominent donor to the Democratic Party in the United States. In recent years, that has regularly led to criticism from President Trump, who has called him a “second-rate movie star,” among other things. According to Clooney, it didn’t bother him much. “It’s not my job to keep the President of the United States happy.”
US accepts dual citizenship so I doubt he gave it up.
He could have saved a bit of taxes.
Depending on the intricacies of tax treaties you probably won’t pay much US tax after moving to a high taxation country. Relinquishing US citizenship when you are wealthy means paying the capital gains exit tax on your worldwide assets though so if you can afford good accountants, keeping both is probably easier
who the hell is still filing taxes?