President Joe Biden went off-script during his first joint address to Congress on Wednesday to thank Senate Minority Leader Mitch McConnell for a tribute the Kentucky Republican made to Biden’s late son, Beau, in 2016.President Joe Biden went off-script during his first joint address to Congress on Wednesday to thank Senate Minority Leader Mitch McConnell for a tribute the Kentucky Republican made to Biden’s late son, Beau, in 2016.