 Live from NPR News in Washington, I'm Lakshmi Singh. A high-stakes debate takes place tonight at 9 p.m. Eastern in Atlanta, Georgia. CNN's hosting the showdown between Joe Biden and Donald Trump. Millions of people will be watching the historic event between a sitting president and a former president. NPR's Frank Ordonez says Trump's flipped the script on his description of Biden, whom he now calls a worthy debater. He sure wasn't indicating that he'd play along when he was talking this weekend in Philadelphia.