The symbolic action comes as Sinema has come under criticism from progressive groups in Arizona after she voted to uphold the filibuster in the Senate.
Michigan Democratic Rep. Rashida Tlaib wore a thobe to her swearing-in ceremony, and women responded on social media with photographs of themselves wearing the elaborate embroidered Palestinian dress.
Andrew Gillum's upset victory in the Florida Democratic gubernatorial primary pits a young, black Democratic progressive against a Republican who has staked his career on his ties to Trump.
