WASHINGTON - Detectives probing U.S. Rep. Patrick Kennedy’s early-morning car wreck interviewed workers at the Hawk ’n’ Dove bar yesterday while rank-and-file Capitol police are pushing prosecutors to throw the book at the well-connected pol. “Mr. Kennedy, by his own admission, was operating under the influence of narcotics, which is a violation,” said Lou Cannon, president of the Capitol police union. Cannon said detectives probing the Rhode Island Democrat’s 2:45 a.m. wreck visited several watering holes along Pennsylvania Avenue yesterday, asking bartenders and waitstaff if they saw Kennedy in the hours before the congressman crashed his Mustang convertible into a...