Poll: Sanders pulls within 6 points of Clinton in Iowa
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Sen. Bernie SandersBernie SandersSanders: FBI inquiry of wife is 'pathetic' attack Why UK millennials voting for socialism could happen here, too WATCH LIVE: Senate Dems hold ‘People’s Filibuster’ against ObamaCare repeal MORE (I-Vt.) is closing the gap with Democratic front-runner Hillary ClintonHillary Rodham ClintonPro-Trump group pulls ads targeting GOP senator on ObamaCare repeal Stone to testify before House Intel Committee next month Overnight Cybersecurity: New ransomware attack spreads globally | US pharma giant hit | House intel panel interviews Podesta | US, Kenya deepen cyber partnership MORE in Iowa, a new poll released Tuesday finds. 

A new Public Policy Polling survey found that the former secretary of State leads Sanders 46 to 40 percent, down from an 18 point lead last month.

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The new PPP survey is the latest sign that the race is tightening between the two Democratic rivals weeks before the first-in-the-nation caucuses. Another poll released Tuesday shows Sanders surpassing Clinton in Iowa, 49 to 44 percent, overtaking an 11 point deficit the previous month.

In the PPP poll, the Democratic front-runner’s favorable rating remains relatively stagnant from last month at 72 percent to 22 percent unfavorable. But Sanders’s favorable rating has surged to 79 percent to 13 percent unfavorable. Last month, the Vermont senator received a rating of 65 percent favorable to 23 percent unfavorable. 

Former Maryland Gov. Martin O’Malley lags far behind at 8 percent. The poll also found that his candidacy is boosting Clinton’s support in Iowa. O’Malley supporters prefer Sanders to Clinton, 43 to 20 percent.

The poll was conducted from Jan. 8 to 10 and surveyed 580 likely Democratic caucusgoers with a margin of error of 4.1 percentage points.