I don't know why you see a need to overthink this.
Tucker Carlson is someone who likes to present as a serious guy. He wore a bow-tie as an adult man. He's been directly screwed by extremely shoddy research from 'voter fraud' cheerleaders, with the two cases of the smoking gun dead people who... weren't. He could just have clowns like Powell or Giuliani on to spout a bunch of nonsense and not challenge them at all, but that would be a bit embarrassing after all the kayfabe legal challenges fail.
Sure, he'll lose some audience from retards who see politics as a team sport like American football where their team of rapists can do no wrong and the other teams of rapists are evil incarnate, but he would lose audience sooner or later if he behaved like some Hannity/Rush type shill too, sooo..
Alternatively, perhaps the MyPillow guy is annoyed that sales are down because his customers are sending money to Trump instead, and wants this over as soon as possible.