President Joe Biden addresses a joint session of Congress as Vice President Kamala Harris (L) and Speaker of the House U.S. Rep. Nancy Pelosi (R) look on in the House chamber of the U.S. Capitol April 28, 2021 in Washington, D.C. | Getty Images/Melina Mara-Pool In his first speech before a joint session of U.S. Congress Wednesday night, President Joe Biden urged the legislative branch to support his progressive agenda, unveiled his American Families Plan and warned of the threat posed by white supremacy. Biden addressed the 117th Congress in the U.S. House of Representatives chamber one day before his 100th day in office. While Biden spent his speech attempting to portray his proposals as popular among Americans of all political persuasions, the president also made overtures to the progressive base of the Democratic Party.