After announcing his intention to challenge Sen. Jim Bunning (R) last week, state Attorney General Jack Conway will formally kick off his campaign at 4:30 p.m. today at the Muhammad Ali Center in Louisville.

Conway’s political ally, state Auditor Crit Luallen — who was also mentioned as a potential Senate candidate this cycle — is expected to join Conway for his announcement today, along with Rep. John Yarmuth (D) and other state officials.

But, Conway does not have a clear road to the Democratic nomination. Lt. Gov. Daniel Mongiardo (D) announced in January that he would take a second shot at the Senate seat after narrowly losing to Bunning in 2004. Gov. Steve Beshear (D) announced his endorsement of Mongiardo in late March.