Iowa Caucus

Six polls in a row now show the former neurosurgeon tied with or ahead of Donald Trump.
Donald Trump has dropped to second place.
"She came off more personable than she normally does."
In sharp contrast to his failed rival, Rubio avoids the extravagant.
Liz Mair was fired over tweets earlier this year, but she took to Twitter Monday to explain why Walker couldn't win the White House in 2016.
Iowa and New Hampshire like him, but many voters elsewhere don't know him.
The famed neurosurgeon's low-key approach has paid off, but will it hold up under scrutiny?
Sanders is 9 points ahead of Clinton in New Hampshire and trails by 11 points in Iowa.