Michelle Obama is a master in the subtle art of shade. The former first lady took to Twitter Saturday to honor a step-dancing team from Baltimore, just hours after President Donald Trump attacked a prominent African-American congressman and referred to his Baltimore district as a "disgusting, rat and rodent infested mess." "On #NationalDanceDay, I'm shouting out the Lethal Ladies, a Baltimore STEP team who I saw perform back in 2017. I'm so proud of you all—and everyone who's dancing today!" Obama wrote.