Sen. J.D. Vance (R) Ohio accepted the GOP nomination for Vice President at Wednesday night's convention in Milwaukee. Introducing himself to the nation after being tapped as Donald Trump's running mate, JD Vance used his Wednesday night address to the Republican National Convention to share the story of his hardscrabble upbringing and make the case that his party best understands the challenges facing struggling Americans. The 39-year-old Ohio senator is a relative political unknown, having served in the Senate for less than two years. In his first prime-time address since Trump made his pick, Vance cast himself as fighter for a forgotten working class, making a direct appeal to the Rust Belt voters who helped drive Trump’s surprise 2016 victory and voicing their anger and frustration. “In small towns like mine in Ohio, or next door in Pennsylvania, or in Michigan, in states all across our country, jobs were sent overseas and children were sent to war,” he said. “To the people of Middletown, Ohio, and all the forgotten communities in Michigan, Wisconsin, Pennsylvania and Ohio, and every corner of our nation, I promise you this," he said. "I will be a vice president who never forgets where he came from.” Read more: https://www.9news.com/article/news/nation-world/jd-vance-will-introduce-himself-to-a-national-audience-at-the-rnc/507-7da7bb7d-e474-4145-aa6e-79ffbb49eaa2 Video Source: CNN More local videos here: https://bit.ly/2Pa0d1l Subscribe to NEXT: http://bit.ly/2eP1GwI Stay connected: 9NEWS Website: http://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.