Former Vice President Joe Biden intervened in Alabama's special Senate election, endorsing Doug Jones in the Democratic primary on Thursday.

Biden recorded a robocall urging voters to vote for Jones, a former federal prosecutor who is known for his handling of the 1963 bombing of the 16th Street Baptist Church in Birmingham, Ala.

Jones' campaign released the text of Biden's robocall in a Facebook post.

"Doug has spent his entire life fighting for justice," Biden said. "He was the man after the 1963 church bombings that would not let it rest until he found the killers of those four young girls -- and he eventually found justice -- prosecuting and jailing those Klansmen nearly 40 years later. He'll take that same energy and drive and fight for you and your families in the Senate -- for a higher minimum wage, for fair, affordable healthcare, for good schools for all our kids. Doug Jones will make a great U.S. Senator so please make sure you get out and vote on Tuesday -- and I'm hoping you'll vote for my friend, Doug Jones."

Jones is one of seven Democratic candidates seeking the nomination in next Tuesday's primary election.

President Trump on Tuesday injected himself into the Republican primary for Alabama's special election, endorsing Sen. Luther Strange.

Strange is facing off with Rep. Mo Brooks and Roy Moore, a former state Supreme Court justice.

The race is to fill the seat vacated by Attorney General Jeff Sessions.