Kara Eastman, a progressive backed by high-profile Democrats including New York Rep. Alexandria Ocasio-Cortez and Massachusetts Sen. Elizabeth Warren, captured victory Tuesday in a Nebraska Democratic congressional primary, boosting the hopes of liberal activists. The win by Eastman – who unsuccessfully sought the seat two years ago -- in the state's 2nd congressional district sets up a highly anticipated 2018 general election rematch with Republicans and serves as a rebound for progressive candidates in 2020 races. Eastman trounced her centrist primary opponent, Ann Ashford, securing more than 60 percent of the vote as she moves forward to November’s election. It...