FBI agents late Tuesday night raided the West Palm Beach business of an eye doctor suspected of providing free trips and even underage Dominican Republic prostitutes to U.S. Sen. Bob Menendez, D-N.J. — who has denied what he calls the “fallacious allegations.” Agents gathered at the medical-office complex of Dr. Salomon Melgen, a contributor to Menendez and other prominent politicians, to start hauling away potential evidence in several vans. The investigation is believed to be focusing on Melgen’s finances and the allegations about Menendez’s trips and contact with prostitutes. A spokesman for Menendez could not be reached for comment, nor...