I think this goes one of two ways, that a meh deal is made within the coming weeks and once Trump is reelected he instantly puts tariffs back up to negotiate a much better deal.
Or China is doing this and delaying/letting their economy take the hit to make Trump look weak.
Cause him to lose 2020, then make a deal with whomever is the new president elect.
Easy decision for a new president to make it look like they did the thing the past guy couldn't.
I just don't see a great US favorable deal coming out of this with the elections in sight, and with all the other stuff going on with NK/Iran/Venezula etc. any good thing would be a major win for his party, and a China deal would be a big one. Even if we give in or not, China says we did to make them look good/ Trump says we didn't and it was a yuge deal we made.