Dr. Stephen Hahn, FDA Commissioner, says he's confident in the safety and efficacy of the Covid-19 vaccines. Patrick Foye, MTA Chairman & CEO, says latest relief package would prevent service cuts and layoffs in 2021. Diane Swonk, Grant Thornton Chief Economist, says the economy is losing momentum at a critical time. Julie Norman, University College London Political Science Professor, discusses the significance of Trump's surprise attack on Congress’s bipartisan relief bill.