In 2013, Brantner was elected to the Bundestag (the German Parliament) for &lt;a href="Alliance%20%2790/The%20Greens"&gt;Alliance '90/The Greens&lt;/a&gt;, succeeding Fritz Kuhn as representative of the 274th district Heidelberg. Following the 2013 federal election, she became a member of the Bundestag.