Not sure what Shatner is up to here.

BTW 16 US Presidents owned slaves. Many of them are featured on US Currecy. 😱I’d suggest those offended round up all this objectionable currency - make sure you check the pockets of the clothes in the hamper 😏 and send all that offensive cash to me. If you need my address 👇🏻 pic.twitter.com/jRR6Ls2WtV

— William Shatner (@WilliamShatner) July 1, 2018