This is the 3rd or 4th corruption scandal of Menendez. Also the second time he's being tried for corruption, first one was in 2018 and it was dropped by the court.
Menendez doesn't have to be nominated as well. He will just enter his state's democratic party primary and will just win in a landslide, probably also win the election.
And the dude is preparing his son for his spot. He's a political animal. He's not at all "done for."
Menendez is also not the only one the lobbies have, none at all. This cheering will turn to frowns if Pallone or Van Hollen replaces him in 3 months. Menendez is only a symptom, not the cause. He's not a rogue agent flying under the radar.