FORT WORTH -- There's a shake-up at the top of Wendy Davis' campaign for governor.
The Democratic nominee is replacing her campaign manager. Davis released the announcement Wednesday morning.
Her campaign has struggled against Republican front-runner Greg Abbott -- long considered a strong favorite.
Davis says Karin Johanson agreed to step aside in favor of State Representative Chris Turner of Arlington. Turner previously managed the campaign of former U.S. Representative Chet Edwards.
Davis says Turner has had nearly two decades of Texas politics experience "and knows how to win in tough races."