Former President Bill Clinton will visit Maine on Sept. 26 in an attempt to rally the Democratic base ahead of the November elections.

Clinton, who served as president from 1993 to 2001 and remains a big draw for Democrats, will speak in South Portland in the evening, according to three Democratic sources who asked not to be named.

Additional Photos

Bill Clinton campaigns at the Portland Expo. for his wife Hillary during the 2008 presidential campaign. Doug Jones/Staff photographer

The rally will be free. It was unclear how many people would be able to attend, a source said, but priority would be given to people who have been working on campaigns “as a way for the Democrat party to rile up volunteers.”

The Maine Democratic Party and representatives from the offices of U.S. Reps. Chellie Pingree and Mike Michaud could not confirm the visit. A spokesperson for Clinton’s foundation was not immediately available.

In addition to Pingree and Michaud, the candidate to receive the potentially largest benefit from Clinton’s visit is Democrat Elizabeth “Libby” Mitchell, who is running for governor and has lagged behind her Republican opponent in the polls.

Republican Paul LePage was leading the five-person pack with 43 percent support, Democrat Libby Mitchell had 29 percent and independent Eliot Cutler pulled in 11 percent, in a poll conducted in the first week of September by Public Policy Polling. Independent Shawn Moody earned 5 percent and independent Kevin Scott got 1 percent.

Clinton isn’t the first big name to visit Maine in hopes of influencing the state’s politics. Former New York City Mayor Rudy Giuliani held an event last week for Dean Scontras, the Republican trying to unseat incumbent Pingree in Maine’s 1st Congressional District.