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As he has so many times since bursting onto the presidential stage in 2015, Donald Trump played the race card on Sunday. He launched nearly three dozen broadsides on Twitter throughout the day, but a trio of his tweets stood out because they demonstrated how casually he likes to uncork his venom and how unwilling the Republican Party is to contain him.

Trump was targeting four new Democratic congresswomen of color (nicknamed "The Squad") who have become ubiquitous advocates for progressive policies and occasional thorns in House Speaker Nancy Pelosi's side: Alexandria Ocasio-Cortez of New York, Ilhan Omar of Minnesota, Ayanna Pressley of Massachusetts and Rashida Tlaib of Michigan.

Omar is from Somalia. The other three women were born in the U.S.

Pressley is black and was born in Ohio. Ocasio-Cortez was born in New York and is of Puerto Rican descent. Tlaib was born in Michigan, and her parents were Palestinian immigrants.

So Trump's tweets could have been translated as: "If you're a black woman born in the U.S. and a member of Congress, I think you belong in Africa."

Or, perhaps: "If you're a woman of Hispanic descent born in the U.S. and a member of Congress, I think you belong in Puerto Rico -- and I still seem to think that's another country."