Pelosi's feud with Ocasio-Cortez tests party heading to 2020

They don't talk to each other much, House Speaker Nancy Pelosi and Rep. Alexandria Ocasio-Cortez. But they're lately speaking at one another in a way that threatens party unity and underscores broader tensions reshaping the Democrats. Their power struggle has spilled open in what could be a momentary blip or a foreshadowing of divisions to come. It started with a rare public rebuke Pelosi chiding AOC, as she's called, in a newspaper interview; AOC responding pointedly on Twitter that's now challenging the House agenda and rippling into the 2020 presidential campaign. A new test will come this week on a must-pass defense bill that the White House on Tuesday threatened to veto. At its core, the tension between the most powerful Democrat in the country and one of the party's newest, most liberal members embodies a debate over how best, in style and substance, to defeat President Donald Trump. And both sides think they're right.