DS is yanking your chain, folks. Read closely. He has no problem with Trump not automatically giving any result his full endorsement.
Our election system is distributed. If it's (significantly) crooked, it's crooked in so many places at so many times by so many different elected officials that you've got to have your tinfoil on very tightly to buy it. I can buy that there's corruption at the local level (duh) but the idea that there's corruption widespread enough, on only one side, to influence a presidential election is not realistic.
That would have to be some kind of vast left/right wing conspiracy. Now, if someone goes for that kind of thinking that's fine but you can't really have a discussion if the basic assumption is that everyone is corrupt, including all the grannies that volunteer for the polling stations.
Your post is naive.
No tinfoil necessary given:
1. The rather regular charges and indictments of those committing election fraud.
2. The many times Dem electioneers are caught on video actively committing fraud, helping describe how to commit fraud, or bragging about election fraud.
3. Even Dems, decades after the elections, admit that several close races were brought home by them due to election fraud.
And the election fraud only need be in several of the contested states. Or in one city to deliver an entire state (Chicago).