The two leading Democratic presidential contenders on Saturday night drew their clearest and sharpest distinctions yet.
At a high-profile Democratic party dinner here, Sen. Bernie Sanders took a series of veiled, yet unmistakable jabs at former secretary of state Hillary Rodham Clinton, saying that he would govern on principle.
Where Sanders' address represented a new and more aggressive posture against the frontrunner, Clinton delivered one that was close to her standard stump speech, in which she made the argumenthat she would be a fighter who would find common ground and deliver results.
The latest poll by the Des Moines Register and Bloomberg Politics found that Clinton and Sanders are locked in a relatively tight race in this state.
She led him by seven percentage points, 48 percent to 41 percent.