Washington — Democratic Rep. Steve Cohen of Tennessee announced Friday that he's dropping his bid for reelection in Tennessee's 9th congressional district, a seat he's held since 2007. 

He made the decision in light of the Tennessee legislature's redistricting affected his district in the Memphis area. Cohen, 76, is Tennessee's only Democrat in Congress. He said he'll be retiring from public life.

"This is by far the most difficult moment I've had as an elected official," Cohen said as he opened his remarks.

He said he "considered" running in one of the new districts, but said they are "nothing like the 9th district that I've represented."

This is a developing story and will be updated.