Phil Bredesen

Updated at 8:35 p.m. ET

The campaign for the leading Democratic candidate for Senate in Tennessee, former Gov. Phil Bredesen, said in a letter to the FBI Thursday that it feared it had been hacked.

The potential breach comes as state and federal officials are increasingly worried that enough hasn't been done to improve election security since 2016.

Public Domain, Wikimedia Commons

Democratic U.S. Senate candidate Phil Bredesen says the Florida school shooting shows the need for more rigorous background checks to keep guns out of the hands of mentally ill people.

Photo via Facebook

Democrat James Mackler says he's dropping out of the U.S. Senate race in Tennessee to replace Sen. Bob Corker, a move that appears to clear the path to the Democratic nomination for former Gov. Phil Bredesen.

Public Domain, Wikimedia Commons

While former Tennessee Gov. Phil Bredesen's Democratic bid for the U.S. Senate will focus on "fixing the mess" in Washington, he doesn't plan to talk about Republican President Donald Trump all that much. 

Public Domain, Wikimedia Commons

Former Tennessee Gov. Phil Bredesen is joining the race to succeed Republican Bob Corker in the U.S. Senate.

Wikimedia Commons, Public Domain

Former Gov. Phil Bredesen, the last Democrat to win a statewide race in Tennessee, is considering a bid to succeed retiring Republican Bob Corker in the U.S. Senate. 

capitol.tn.gov

Democrat Craig Fitzhugh is joining the race for Tennessee governor.