NOPE. There is a Pullman car there. I have photos of it as recently as last week at Maytown and sitting in the shop at Western Junction. I can't say where I got them, but I have it first-hand from people who have seen it there in the last few days and someone close to the operation.
It's PRR-brown-ish in color and fully restored. Now, as to the name and history, I have no clue. But it is there.

Not sure what to tell you then, there are no other reports of such a car or movement of one in the area.

I've just confirmed with a photo from someone who runs trains with Rainier Rail that it is indeed the Abraham Lincoln business car sitting at Western Junction right now. He took a shot today and just sent it to me.
It's sitting down there right now, as I type this.

I too received direct photographic proof of the Abraham Lincoln inside the shops at Western Junction, including a RR drumhead.

(And, just so no one can possibly be confused, my handle name on here does not indicate any sort of relation to the shortline [of similar name] in question.)