Iowa pollster Ann Selzer breaks down the latest polls out of Iowa. Sanders has picked up steam in the Midwestern state, while Clinton loses support. Questions remain about a possible window for a Biden 2016 run.
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Ann Selzer
Iowa
Berne, IowaDemocratic candidate Bernie Sanders is resonating with his supporters in Iowa, and is even piquing the interest of undecided voters..
A new CBS News 2016 Battleground Tracker poll shows presidential contender Sen. Bernie Sanders, I-Vermont, leading in both Iowa and..