You wouldn't. They/them is a 3rd person pronoun used when referring to someone. You wouldn't have done it before and you don't do it now. Is it really that hard?
"The state sent 750,000 postcards with the hopes of ten percent of recipients registering to vote."
"CBS4 found a dozen other examples"
Meanwhile
https://www.nytimes.com/2020/09/02/us/politics/trump-people-vote-twice.html