He's not the only one
Several of y'all have mentioned the 12 tickets in 4 years and yet he continued to drive. Such is true with the rich and powerful. They rarely get their due and it remains to be seen what this turkeys sentencing will be like.
However, I have heard dozens of cases where "normal" folks like us are getting 3, 4 even 5 DUIs. Several years ago I was in traffic court for a speeding ticket. The case before mine was a guy who was probably mid 50s, didn't speak English, had never had a license in his life, yet he was in court for his 5th DUI in less than 5 years. The judge finally decided to put him in jail.
I'm not defending the congressman, as I hope he gets the whole 10 years. I'm just saying that when it comes to these sorts of cases a lot of folks should've been stopped way earlier. But, who's the one that can say 'enough is enough' for every driver in the country?