Harris Gleckman, Phd, is a former UN staff member and currently Senior Fellow, Center for Governance and Sustainability, UMass-Boston and member of the Advisory Board of the Foundation for Global Governance and Sustainability (FOGGS).  Author of Multistakeholder Governance and Democracy: A Global Challenge, 2018 Routledge. He can be reached at [email protected] An Open Letter to Friends of the United Nations HARRIS GLECKMAN The only head of state so far committed to physically addressing the opening of the new UN General Assembly session is US President Trump. As the rules for COVID-19 allow only one of the six seats of each…