THIS EPISODE: Donald Trump not conceding that he lost the 2020 presidential election to President-Elect Joe Biden ‘imposes a cost’ on America legal expert Joshua A. Geltzer says. Rep. Bennie Thompson adds, ‘The Secret Service guards the White House and the sitting president. If the sitting president is Joe Biden then Trump is a trespasser.’ PLUS: Migrant treatment by U.S. authorities at the border requires a human rights commission to investigate abuses, Rep. Joaquin Castro tells Tiffany Cross. AND: President-Elect Joe Biden vows to reunite migrant families separated by the Trump administration, but will these families remain in the U.S.? THEN: Biden transition team member, Dr. Celine Gounder, says ‘we are at war’ with COVID-19. Ending partisanship related to the coronavirus pandemic is discussed by Dr. Gounder on AM JOY. ADDITIONALLY: Obamacare will survive due in part to Supreme Court Justice Roberts legal expert Elie Mystal tells Cross. THEN: The Georgia Senate runoffs will be driven by black voters, who could hand both Senate seats to the Democrats, expert Dr. Jason Johnson says. FINALLY: Donald Trump increasing his 2020 election support among White Women is analyzed by experts. ‘I think one incorrect takeaway from this election is that we wash our hands and say we are no longer speaking to White women,’ Senior Advisor at Democracy Alliance Julie Kohler tells us. All this and more in this Saturday edition of AM JOY on MSNBC.