Guests: Rachel Maddow, Alex Wagner, Steve Kornacki, Jen Psaki, Claire McCaskill, Rep. Ruben Gallego

The general election has begun. Donald Trump running unopposed against President Biden. Tonight: Rachel Maddow and Alex Wagner join on Biden's chances against candidate Trump as Republicans try to erase the memory of his disastrous presidency. Then, Steve Kornacki at the Big Board on who will decide this election. And Jen Psaki and Claire McCaskill on what's at stake. Plus, Rep. Ruben Gallego joins me for his first national TV interview since Senator Sinema dropped out.