I think the resistance (whatever that means) is overlooking a potentially devastating weapon: Trump's insecurities. His pathological need for approval obviously overrides any moral, political or intellectual core he might have. Why aren't we trying to take advantage of this?
(Because he's loathsome, that's why. But that just means only equally loathsome people are left to stoke his ego, resulting in loathsome policies.)
I 100% believe that if Trump thought the majority of the country wanted him to do something (say, push for single payer), he would do it. He wouldn't consider the cost to his party, or the practical considerations. Particularly if he saw it as one-upping Obama. He just needs to hear "people will love you if you can do this thing Obama couldn't manage".
So: How do we get a message like that to him?