Biden tried again to get the Democratic Party's nomination in the 2008 presidential election. He ran mostly on foreign issues, especially getting U.S. troops out of Iraq. Many thought of him as a good choice for Secretary of State. He stopped his campaign on January 3, 2008 after he did not get many votes in the Iowa caucus. However, he later became Barack Obama's pick for Vice President due to what he knew about Iraq and because the working class liked him.