During a chance encounter with Bill de Blasio on the J train, straphanger Alvin Javier convinced the mayor to call out the commander-in-chief. “I think he can beat Obama. This is his official challenge,” Javier says. “Obama, my mayor is going to play you 1-on-1 at ball. Do you accept?” De Blasio says it’s a “great idea,” noting that Obama “has more basketball skills and practices a lot more but I have height.” While Politico reported this week that the president wants to move to New York after leaving office, the same article revealed that Obama has given up basketball because he’s worried about getting hurt. How convenient.