The messages left with Tlaib and Booker appear to be motivated by comments about the 9/11 terrorist attacks made by U.S. Rep. Ilhan Omar of Minnesota, a Muslim. President Donald Trump seized on Omar’s remark that “some people did something” on 9/11 to post a video of her interspersed with images of the terrorist attack. Democrats rushed to her defense, accusing Trump of Islamophobia.