Sen. Mary LandrieuMary LandrieuProject Veritas at risk of losing fundraising license in New York, AG warns You want to recall John McCain? Good luck, it will be impossible CNN producer on new O'Keefe video: Voters are 'stupid,' Trump is 'crazy' MORE (D-La.) leads her GOP opponents in a new survey from conservative pollster Magellan Strategies — but falls far below the 50 percent threshold to win her race outright in November.

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Landrieu pulls 39 percent to Rep. Bill Cassidy's (R-La.) 26 percent in the automated poll of registered voters.

While the poll finds a notably high number of undecided voters in the poll, at 28 percent, those numbers indicate that Landrieu and Cassidy are likely to face off in a December runoff, as Louisiana's all-party primary requires a candidate to win 50 percent of the vote.

The automated poll of 600 registered voters was commissioned by conservative businessman Lane Grigsby and conducted from March 24-26. It has a margin of error of plus or minus 4.1 percentage points.