Former President Barack Obama and former Vice President Joe Biden have recorded calls urging turnout in Alabama's heated race for U.S. Senate.

A person familiar with the campaign said Monday that Obama had recorded a message in support of Democrat Doug Jones. Jones is attempting to become the first Alabama Democrat elected to the U.S. Senate in 25 years. He is locked in a heated battle with Republican Roy Moore.

Biden held a rally for Jones in Birmingham earlier this year and has also recorded a call for Jones.

The Jones camp is sending out dozens of types of calls on the eve of the election to urge turnout. They include a news clip in which Republican Sen. Richard Shelby said that Alabama deserves better than Moore.

President Donald Trump has recorded a call urging people to vote for Moore.