DES MOINES, Iowa – Bernie Sanders' campaign manager, Jeff Weaver, issued the following statement Saturday on negotiations over additional debates:
"After refusing for months to participate in more debates, Secretary Clinton requested that the Democratic National Committee rules be changed and that a new debate take place in New Hampshire next week. We agreed pending an agreement on three future debates in March, April and May. Unfortunately, the Clinton campaign has not accepted debates we proposed on March 3 in Michigan and April 14 in New York. They apparently agreed to May 24 in California. The Clinton campaign, after not accepting Michigan, now says they want it. We are pleased to do it on March 3 before the Michigan primary provided the Clinton campaign will agree to Brooklyn, New York, on April 14. Why won't they debate in Brooklyn? What's the matter with Brooklyn?"
Bernie Sanders, Sanders Campaign Press Release - Sanders Campaign Statement on Debates Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/314235