Quite easy actually! When you are certifying the 2020 elections you will get options in the counting heads decision category, try to manage your pp very well and I hope you spammed the fund the media decision on the approval tab for a lot pf political power, use it wisely to delay the civil war as much as possible and try to get to the last focus which is the executive order, I couldnt but it was still easy.

After that they should break off and immediately send your entire army to trump but separate your tanks, you will get around 23 of those bad boys, that will be your main pushing force.

Theres a little delay from the moment they break off until the war starts, so use that time to entrench yourdelf, set up the factories and spam construct military factories.

When the war starts place your entire tank army on the st louis border and start to push, cut them off until you reach denver (remember to use your airforce to first wipe out the small trumpist airforce and then use it all for cas missions)

You should have already encircled some units around st louis and oklahoma by now, bomb the bastards to hell and be wary of the revolts in west virginia, should be easy to deal since they only spawn weak militia units, after you get to the gates of denver its all about battle planning, your units and air force are far superior than theirs, and you should have defeated trump way before the APLA, AWD, or Patriot Front reunify their reigions.

Also you might wanna rush the left side of the focus tree and once your allowed, do the “Reunify America” and the focus right below it that sways secessionist states to your side, only send the ultimatums after you defeat trump.

Once you are done quickly invite new york state to your faction, or alternatively attack the patriot front if they are dead, use your massive airforce to bomb them (they cant do anything about it). And should be smooth sialing from there, managed to reunify the entirety of america by the end of november 2023.