Trump only won The EC by 80,000 votes and his approval ratings in states that won him the EC has gone down.
Also need to remember that "disapproved" can mean a lot of things. It doesn't necessarily mean they won't vote for him. I suspect if you drilled down to it, it's not policy, but is the tweeting. --When faced with a decision between Trump and Warren etc., Trump most likely gets the vote with most. ---Keep on putting forth polls though. It possibly could give you hope.
When its a guy who lost by millions and only won The EC by 80,000 with low democrat turnout it doesn't look good for him.