President Joe Biden threw a little shade Monday at the Republican frontrunner ousted from the White House four years ago. Biden cracked a smile and chuckled when he heard former President Donald Trump wanted to debate him “immediately,” video posted to X by The Recount shows. “Donald Trump says he’s ready to debate you right now,” a reporter said. “Do you accept?” Biden broke into a laugh. “He wants to debate you ‘immediately,” another journalist informed the president. “Immediately?” Biden asked. “Yes,” was the stern reply. “If I were him, I’d want him to debate me, too,” Biden says as the ca…