The tweet was in reference to a story Hamm shared about an "SNL" after-party Donald Trump attended in 2015.
"He was with Bill O'Reilly. They're both tall dudes. And I'm a tall dude. And they both do that tall-dude thing, which is to try to intimidate you," Hamm explained. "And it doesn't work on me. I'm like, 'I'm as alpha as you. Let's go. You're not going to chest-bump me.'"
Hamm added that "it was a very weird night" and "the shortest I've ever stayed at an 'SNL' afterparty."