In 2016 folks were excited about it and thought great things were going to happen (hence 'Great' in Make America Great Again) but it didn't turn out quite like many had hoped, a lot feel they were betrayed and all. Now Donald Trump is going at it again with the MAGA slogan/ideology and it seems many still fall for it.
Can't say I'm surprised when billions of people feel that being part of a political side (left and right) will ultimately make any change when it's actually the government itself and politicians, not some Average Joe. He promised US citizens to build the border wall but that's not finalized and may not (others don't seem to agree and want it done). Yet, there seems to be talks of Trump buying the country Greenland but hopefully that's just it, talks.
Personally, I don't take sides but support a person who I may agree with. In general I've not found anyone in politics around the world that seems actually genuine, most just, you know, lie their way into power.