Lobbying Intensifies Among V.P. Candidates as Biden’s Search Nears an End. Presidential Election of 2020, United States Politics and Government, Vice Presidents and Vice Presidency (US), Bass, Karen Ruth, Biden, Joseph R Jr, Demings, Val, Duckworth, L Tammy, Harris, Kamala D, Rice, Susan E, Warren, Elizabeth, Whitmer, Gretchen, Democratic Party