Longtime commissioner Tommy Adkisson says he's running for Bexar County's top job.
Adkisson announced Sunday afternoon he will be a candidate for county judge in next year's election.
That decision would apparently set up a showdown with current county judge and former San Antonio Mayor Nelson Wolff.
Both are Democrats.
Adkisson is in his fourth term as a Bexar County commissioner.
He also served two terms in the Texas House.
The 64 year-old Adkisson has worked on county jail, health care, road improvement and other issues.
Wolff has been county judge since 2001. He announced his plans to seek re-election in 2012.
Adkisson says he considered running for county judge before Wolff took office.
He says he now thinks the time is right for a change.
Adkisson will file for the county judge election on Monday.