Well, according to the transcript released by the White House of the "Remarks by President Trump During Thanksgiving Video Teleconference with Members of the Military", the only person he called "[probably] a communist" was one of the Democrats running for Senate in Georgia.
But, anyway, going back to Georgia, just for a second: So I’ll be going there on Saturday night, and maybe I’ll go twice. It’s very important that we win those races. These are two great people. I know them both very well. They’re both great people.
And I think the two people — you know, I beat — the one gentleman, he ran against a congressional candidate who was an excellent person, frankly. And he didn’t even live in the right community, and that’s how we won. So now I have to beat him again. He lost as a congressman. He was going for Congress, as you remember. And now — against Karen. And now — and now he’s running against David. He doesn’t deserve to be there. He’s a lightweight.
And the other one is either a communist or socialist; I can’t figure that one out yet. But he’s either a communist or a socialist. Probably a communist. This is not for Georgia.
The first Democrat mentioned by Trump there is no doubt Jon Ossoff, so the second whom Trump labelled "probably a communist" has to be Raphael Warnock
. As far as I can tell Warnock held no positions as an election official, the closest thing in his Wikipedia bio being that he "chaired the New Georgia Project, a nonpartisan organization focused on voter registration." So AP reporters probably misunderstood whom Trump was referring to as "probably a communist" or misunderstood his (Warnock's) role in the election process.
On the other hand, the White House transcript confirms Trump called Georgia's Secretary of State "an enemy of the people".