Some GOP candidates want to use force against Mexico to stop fentanyl, experts say that won’t work

Ron DeSantis wants suspected drug smugglers at the U.S.-Mexico border to be shot dead. Nikki Haley promises to send American special forces into Mexico. Vivek Ramaswamy has accused Mexico's leader of treating drug cartels as his "sugar daddy" and says that if he is elected president, "there will be a new daddy in town."