• Incumbent Democratic congressman Michael Capuano, right, and primary challenger Ayanna Pressley during a debate at the University of Massachusetts, in Boston, Tuesday, Aug. 7, 2018. (AP Photo/Charles Krupa)

    Democrats measure their desire for change in JFK's old district

    By Eric Bradner, CNN
    Rising Democratic star Ayanna Pressley is testing whether her party is willing to cast aside its experienced and reliable veterans in favor of a new generation of leaders who argue they are more suited for politics in the Donald Trump era.
  • AUSTIN, TX - APRIL 1: Rep. Beto O'Rourke (D-TX) speaks to a group of supporters at Scholz Garten on April 1, 2017 in Austin, Texas. O'Rourke announced his plan to run for Ted Cruz's Senate seat on Friday and launched his campaign with a four-city tour of Texas. (Photo by Drew Anthony Smith/Getty Images)