According to US law, can a person have a husband and a wife at the same time?
If so, how is their property distributed after death?
Currently there is nowhere in the USA where polygamy is legal. So regardless of their sexual or gender expression or orientation, being married to MORE THAN ONE person at the same time is illegal.
If, however, it turned out that someone had more than one spouse at their death, I'm sure that property distribution would be a matter for the probate court to sort out.
As far as legally-married "trans spouses", for lack of a better term, I don't see why that would that impact inheritance in any way?