In May 2015, Maryland governor Martin O'Malley announced his campaign. He withdrew after the Iowa primaries. Rhode Island governor Lincoln Chafee announced his campaign in June 2015. After poor polling numbers, he dropped out before the primaries in October 2015. Former Virginia senator Jim Webb announced his campaign in the summer of 2015. He dropped out in October 2015 after a poor debate performance. Professor Lawrence Lessig announced his campaign in September 2015. He dropped out a month later after poor polling numbers.