I think broad, Middle Class and even lower middle class tax cuts would be a huge boon. He has to remain strong on China, this is a key issue that the Dems purposely avoid. They are China First, Trump confronts them openly like no other leader. Do these two things (along with keeping his promises as he has and not relenting), and 2020 is going to be much tougher for his opponent. He needs to create the dichotomy between his philosophy and that of others.