Today on The Exchange, a conversation with Steve Marchand, who's launched his campaign to be the Democratic challenger to Governor Chris Sununu in 2018. Marchand, who served as mayor of Portsmouth from 2005-2008, lost the gubernatorial primary to Colin Van Ostern in 2016. ( Click here to see NHPR's coverage of the 2016 race and click here to find out where he stood on the issues.) Note: This story includes audio, video, and transcripts of the interview and our special Facebook Live "overtime"