DETROIT -- Vice President Joe Biden is visiting Detroit to speak to a gathering of liberal activists.
Biden is scheduled to speak Thursday afternoon on the first day of the Netroots Nation conference, which is billed at the country's largest annual conference for progressives.
Potential 2016 presidential candidates like Biden and Massachusetts Sen. Elizabeth Warren are in the middle of a summertime tour of Democratic constituencies. Warren will speak at the event on Friday and also help raise money for Gary Peters, who is running for U.S. Senate in Michigan against Republican Terri Lynn Land.
Hillary Rodham Clinton is not attending the four-day conference.
Michigan Democrats are hoping the conference also shines a spotlight on 2014 elections in the state, where Republicans control state government.