It’s all lined out on his website under the position tab. This page freaks out when i try to post a link, so i guess you’ll have to do some legwork on your own to find it.
Mexico will indeed pay for the wall, or lose out on billions after wire transfer institutions are forced to operate as banks and confirm the legal status of anyone using them. And China will be forced to play by the international trade rules that everyone else operates under, making the international market better for the US as well as much of the EU as a side effect.
As he says, we hold all the cards in these major matters. A few minor tweaks to regulations could bring Mexico and China to their knees financially. Its about time we elect a leader with the balls to stand up for domestic workers and business instead of continuing the march of American decline from relevance.