I have not seen these mentioned anywhere. Two different 5 card sets, one for Trump, one for Clinton, by a company called the Merrick Mint

Technically "not" promos as they are sold, not given out, but they promote the candidates

If they were for "promotion", well, one worked and the other one didn't, haha.

But seriously, I haven't seen them.

Looks like the company primarily does coins and paper "currency" of celebs like James Dean, but they also did these cards

Can be seen on the company's website and the "auction sites"

Probably similar to the Bradford Exchange, who makes all types of limited collectibles. And by limited I mean out of 10,000.

Also the Danbury Mint specializes in coins. Same deal, it's all billed as collectibles.