Poll: Tester leads GOP challenger by 4 in Montana

Poll: Tester leads GOP challenger by 4 in Montana
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Sen. Jon TesterJonathan (Jon) TesterOvernight Defense: Trump officials say efforts to deter Iran are working | Trump taps new Air Force secretary | House panel passes defense bill that limits border wall funds GOP angst grows amid Trump trade war Overnight Defense — Presented by Huntington Ingalls Industries — Pentagon approves transfer of .5B to border wall | Dems blast move | House Dem pushes Pelosi to sue over Trump's Yemen veto MORE (D-Mont.) is leading his Republican opponent Matt Rosendale by 4 points in his Senate reelection bid in Montana, according to a poll released Tuesday.

A new Gravis Marketing survey found Tester ahead of Rosendale, 49 to 45 percent, just outside of the poll’s margin of error. Six percent of likely voters in Montana remain undecided.

In the poll, Tester is leading Rosendale by double digits among independent voters, 55 to 34.3 percent. Tester also holds double-digit edges with female voters and young voters between the ages of 18 and 29.

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Rosendale, Montana's state auditor, has a 10-point advantage with male voters as well as slim leads among voters between the ages of 50 and 64 and those who are 65 and older.

Polls have shown a close Senate race between Tester and Rosendale. A recent poll from CBS News/YouGov had Tester up 2 points, within the survey’s 5.2 percent margin of error. The RealClearPolitics polling average has Tester ahead by 3 points.

Tester is one of 10 Senate Democrats up for reelection in a state that President TrumpDonald John TrumpTrump rips Dems' demands, impeachment talk: 'Witch Hunt continues!' Nevada Senate passes bill that would give Electoral College votes to winner of national popular vote The Hill's Morning Report - Pelosi remains firm despite new impeachment push MORE won in 2016. He won Montana by a little more than 20 points.

The incumbent senator has sought to highlight a working relationship with the president, highlighting the number of bills that Trump has signed into law.

But Trump has criticized Tester at campaign-style rallies held in Montana to boost Rosendale.

And Rosendale, who's cast himself as a close ally of the White House, recently announced that Vice President Mike PenceMichael (Mike) Richard PenceDozens of graduates walk out in protest of Pence address Trudeau on tariff deal: Canadian and US businesses can get back to 'working constructively together' Congress has a duty to go through with the impeachment and public trial of President Trump MORE will travel to the state to campaign with him on Oct. 2.

The poll was conducted from Sept. 19 to 22 and surveyed 710 likely voters in Montana. The margin of error was 3.7 percentage points.