US Senator Bob Menendez was convicted on Tuesday at his corruption trial by a jury in Manhattan federal court, completing the once-powerful New Jersey Democrat’s dramatic downfall. The jury deliberated for more than 12 hours over three days before reaching a verdict in a trial that had taken nine weeks. Menendez, 70, had pleaded not guilty to 16 criminal charges including bribery, acting as a foreign agent and obstructing justice. The trial centered on what federal prosecutors called several overlapping bribery schemes in which the senator and his wife Nadine Menendez accepted hundreds of thou…