The inauguration of Donald J Trump, 45th and 47th President: Trump claims mandate; Trump's big agenda for first 100 days; Trump’s first battle: bureaucratic resistance; Biden pardons siblings minutes before leaving office; preemptively pardons Fauci, Milley, January 6 Committee in final hours in office; Trump to sign slew of executive orders; Trump can use Congressional Review Act to nullify Biden rules; Dr. Martin Luther King Day.