I supported Trump on some issues and opposed him on others. Just like every other president in my lifetime. It's no secret that I don't like Trump. I don't like the man, the in your face personality, his obnoxious and uncouth persona. With his temper tantrums and name calling like a five year old kid who's parents forgot to teach him any manners make be think Trump belongs more in the WWE as a wrestler than in the White House.
I think Trump's distasteful personality caused the Republicans the House much more than his policies. That it is that same persona that may cause him to lose in 2020, not what he has or hasn't done policy wise as president. It's the man himself I don't like. I didn't vote for him in 2016, I voted third party against both Trump and Clinton. I won't vote for him in 2020 either. I just don't like the man. I could support or be for every thing he has done or tried to do 100%, but I still couldn't vote for him. But that doesn't mean I'm an automatic vote for the democratic nominee either. That depends on who they nominate. Nominate someone I like, I'll vote for him. Nominate someone I don't, it's third party again in 2020.
In my opinion, it's Trump dreadful personality that has kept his approval rating at or below 45%, if he had the persona of a Reagan, his approval rating would be 10 points higher and be cruising to reelection. I think this is proven by 55% approving Trump's handling of the economy, but only 44% in the overall job approval. Why? It's not the job he's doing, it is his personality.