On June 16, 2015, Donald Trump announced his candidacy for president. His campaign initially only included a small number of staffers, many of whom were his family members. Roger Stone, a longtime Republican Party operative, was also originally on the campaign. Trump became the official Republican nominee on July 19, 2016, and named Mike Pence his running mate. Top campaign officials originally included Corey Lewandowski, Stephen Bannon, Kellyanne Conway, and Paul Manafort.