Mike Safley, Metro's Department of Law deputy director, said he couldn't comment on pending litigation.
The lawsuit says Bennett was fired Jan. 10 for violating the employee social media policy and for conduct unbecoming of a Metro employee. While off duty, she posted on Facebook a U.S. map showing electoral votes won by Trump versus Hillary Clinton.
The lawsuit says she posted a comment with a racial expletive, but removed it the same day after complaints.
It says she had to remove a Trump 2016 sweatshirt at work.