Not only doesn't he need them, he doesn't want them, and has said so.
Most politicians kowtow to every little segment saying 'I need your support, please support me, what can I do to get your support?'.
Trump is saying 'Here is my agenda, if you like it or can live with it, come on board, otherwise I don't need you.'
'Criticize it and me from the outside'.
Now you can decide for yourself, but he's not coming to run after you for your support.
It's an admirable stand, one which only a confident politician would take.
That's why you've never been confronted with this choice before.
It is up to Trump to unify the party. It is his party now. He owns it. Not in his interest to destroy it.