By Nandita Bose REHOBOTH BEACH, Del. (Reuters) -U.S. President Joe Biden took a spill from his bike on Saturday as he stopped to greet supporters during a weekend trip to Rehoboth Beach, Delaware. He appeared to be uninjured after standing up immediately. “I’m good,” Biden, 79, said after the tumble, which occurred in front of reporters. “I got my foot caught up,” he said. The president, who was wearing a bike helmet, said the toe cages on his bike should be removed after his foot got caught before he could steady himself. Later, Biden spent several minutes chatting with people who had gathere…