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Twenty Democratic presidential hopefuls will take to the stage in Miami, Florida for their first televised debates this week. Held over two nights, with 10 candidates featuring in each, NBC News' Lester Holt, Savannah Guthrie and Chuck Todd, MSNBC's Rachel Maddow and Telemundo's José Diaz-Balart will share moderation duties.
Elizabeth Warren goes into the first debate with a sizeable advantage – many of the best polling candidates have been randomly drawn into the second night together. Warren also continues to gain in the polls, with a pair of recent surveys showing her surging ahead of rivals among progressive voters.
There will also be plenty of scrutiny of former Vice President Joe Biden, after a series of controversies in recent weeks, including invoking segregationist senators with whom he disagreed but worked with as an example of how he can be civil and get things done.