CNBC reports:
Former Vice President Joe Biden is holding his ground as the 2020 Democratic presidential front-runner with six weeks before the first nominating contest.
The latest NBC News/Wall Street Journal poll shows Biden leading among Democratic voters with 28%, compared with 21% for Sen. Bernie Sanders, 18% for Sen. Elizabeth Warren and 9% for Mayor Pete Buttigieg.
Sen. Amy Klobuchar and former New York Mayor Michael Bloomberg had 5% and 4%, respectively.