After the 2013 federal elections, the resignation of Künast and Jürgen Trittin as co-leaders of the Green Party's group in parliament cleared the way for the election of Katrin Göring-Eckardt and Anton Hofreiter. She unsuccessfully ran against Claudia Roth for the office of Vice President of the German Bundestag. Instead, she served as chairwoman of the Committee on Legal Affairs and Consumer Protection from 2014 until 2017. Since 2018, she has been a member of the Committee on Food and Agriculture. Already since 2005, she also been serving on the Committee on the Election of Judges ("Wahlausschuss"), which is in charge of appointing judges to the Federal Constitutional Court of Germany.