This time Lunsford is going after the coveted seat held by longtime U.S. Senator Mitch McConnell.
The democrat filed his papers just 15 minutes shy of Tuesday afternoon's four o'clock deadline.
Lunsford says he made up his mind to get into the race after last night's state of the union address.
Governor Steve Beshear said in a statement that he's pleased to see Lunsford running.
Tuesday was the deadline to file to run for office.