A first-generation American on Thursday launched his campaign for Sen. Cory Booker's (D-N.J.) Senate seat. Rik Mehta, a pharmacist and lawyer whose parents came to the U.S. before he was born, will run as a Republican against Booker, whom he criticizes as having left New Jersey behind to run for the White House. "In a few weeks, when Cory Booker is done showboating around Iowa and dropping out of the presidential race, he'll run back to New Jersey to pretend he cares about all of us he left behind," Mehta said in his campaign video. "The difference this time: He'll...