A lot of people in the USA voted him into office. "Make America great again".
As yet, he has still to demonstrate true statesman-like behaviour on the world stage. Mrs Merkel was not impressed! He will be judged by how statesman-like he is. Sometimes he will have to eat his words. We have not yet had him in office 100 days, so it would be wrong to judge him too soon, although personally I have not been impressed.
Why does he remind me of a certain European leader who came to power in the 1930s and who committed suicide in 1945? Caveat emptor.