Sarah Palin's candidacy for Vice President of the United States was publicly announced by then-presumptive Republican Party presidential candidate John McCain on August 29, 2008. As part of the McCain presidential campaign, Palin, then the incumbent Governor of Alaska, was officially nominated by acclamation at the 2008 Republican National Convention on September 3. The McCain-Palin ticket lost the 2008 presidential election on November 4 to the Barack Obama-Joe Biden ticket.