In this Oct. 13, 2015, file photo, Democratic presidential candidates Sen. Bernie Sanders, I-Vt., left, and Hillary Rodham Clinton talk before the CNN Democratic presidential debate in Las Vegas. The vast majority of Democrats have a favorable view of  Clinton, according to a new Associated Press-GfK poll that shows her recovering lost ground within her own party since the summer. Democrats are divided on whether Sanders could win a general election, with 52 percent saying he could and 46 percent saying he could not. (John Locher/AP Photo)
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