NEW YORK — Sen. Bob Menendez of New Jersey, facing federal bribery charges for the second time in less than a decade, appeared in a Manhattan courtroom Wednesday and pleaded not guilty. Menendez, 69, wearing a slate gray pinstripe suit with a paisley blue tie, appeared at court with his wife, Nadine, 56, who is also charged and pleaded not guilty on Wednesday. The Democratic senator, buffeted .