Alexandria Ocasio-Cortez, Ilhan Omar and Rashida Tlaib to endorse Bernie Sanders for president

(CNN)Rep. Alexandria Ocasio-Cortez of New York, along with progressive freshmen Reps. Ilhan Omar of Minnesota and Rashida Tlaib of Michigan, are endorsing Sen. Bernie Sanders for president, several sources told CNN on Wednesday.

The backing of three of the four "squad" members, with Ocasio-Cortez expected to formally announce her endorsement at a Sanders rally Saturday in New York City, is a welcome boost for the Sanders campaign, which has gone to great lengths to win over voters of color and create the kind of diverse coalition that mostly eluded it...