We have arrived at the point-and-giggle phase of Sen. Robert Menendez’s once-laudable career,six months after he has been indicted on 18 federal counts of bribery, extortion, and corruption, and he seems poised for his next big move. Gold Bar Bob finally appears ready to rip the donkey from his lapel — as he can see the momentum for the Democratic party’s nomination for his Senate seat riding with Rep. Andy Kim and first lady Tammy Murphy in the June primary – and that in itself is hopeful. But (always the but) a report from NBC Thursday suggests that New Jersey’s senior Senator is not entire…