It only makes sense for them to "participate." When a candidate calls for a recount in an election, the other candidates should have representatives involved as a matter of course.
Interestingly, there are a lot of Democrats who aren't happy about this. The party is trying to raise money in a desperate attempt to win the runoff election in the Louisiana U.S. Senate race, and they see this as nothing more than a stupid distraction that isn't going to go anywhere.
Trump should call out Soros and Hillary for this attempted coup on twitter and we should jail these 2 seditious criminals who have commited thousands of crimes anyway