Polls of the Democratic field in Iowa constantly show Clinton and Sanders within the margin of error: on Saturday the realclearpolitics.com average of polls in the state had Clinton at 46.8% and Sanders at 44.3%, with former Maryland governor Martin O’Malley way behind at 4.3%.
Hillary Clinton may be the front-runner for the Democratic nomination, however she's increasingly seeing a real challenge from the left from Sen. Bernie Sanders (I-Vermont).
Sanders has galvanized the progressive left, and he has become a threat to win more left-leaning, early-voting states like Iowa and New Hampshire.
On many issues, however, Clinton and Sanders aren't that far apart.
Particularly on women's rights and women's-health issues, Sanders' and Clinton's positions are seemingly identical — both support equal-pay bills, both favor universal pre-kindergarten education programs, and both support paid family leave. They're also fairly close together on issues like immigration and some aspects of campaign finance.
But despite some similarities, Sanders remains a challenger with legitimate claims to run as a progressive alternative to Clinton.