Sen. Jay Rockefeller (D-WV) participates in a news conference about preserving Medicaid funding during the 'fiscal cliff' negotiations at the Dirksen Senate Office Building on Capitol Hill December 11, 2012 in Washington, DC. (Getty Images)
(USA Today) -- Democratic Sen. Jay Rockefeller will announce Friday that he will not seek a sixth term in 2014, setting the stage for a pitched battle for his Senate seat in West Virginia.
He is slated to announce his plans in Charleston.
Rockefeller, a former governor and the current chairman of the Senate Commerce Committee, has been in office since 1977. The 75-year-old great-grandson of oil magnate John D. Rockefeller is a staunch supporter of President Obama, who is deeply unpopular in West Virginia.
Rep. Shelley Moore Capito, a Republican whose father was once governor, has already declared her intention to run for the Senate in 2014.
Rockefeller told the Associated Press he wants to spend more time with his family after decades of public service. In 1972, Rockefeller lost his first bid for governor -- to Arch Moore, Capito's father -- before going on to serve two terms from 1969 to 1973.