Georgia State Representative Mesha Mainor of Atlanta switched parties from Democratic to Republican after being criticized for voting with the GOP on several occasions. She’ll be joining a majority GOP House, but resides in a heavily Democratic district, making her reelection prospects poor.
Having worked in somewhat proximity to her, I can say that everyone already knew she was working for the Republicans, so it really wasn’t a surprise. In all likelihood, this is a gambit because she knew she would be primaried if she ran as a Democrat again (her positions were that obtuse).
Edit: Changes made to be more in line with Be(e)ing respectful of everyone.