 Complete the following phrase:  On May 17, 2016, former New Mexico Governor Gary Johnson, the Libertarian Partys 2012 presidential nominee and the leading candidate for its 2016 nomination, announced his selection of Weld to be his choice for running mate. The vice-presidential candidate is formally nominated separately from and after the presidential candidate under the Libertarian Partys rules, although as the presidential nominee Johnson was first allowed to speak about his endorsement of Weld. Both candidates won their nominations on a second ballot after narrowly failing to attain an absolute majority on the first ballot. Weld accepted the Libertarian Partys nomination for vice president at the 