A local mob with the goods on Harry for decades of felonies would have enough power to beat him up and keep him quiet about it. It definitely wasn't Obama or the DOJ. If they wanted Harry, they'd just prosecute him for his obvious corruption, like they suddenly decided to do with Menendez.
A local mob...
I would think that Harry could get the FEDs to protect him from the local mob. They’ve gone after, and destroyed, many mob bosses before. John Gotti died in prison. Raymond Patriarcha got put away. Vincent “the Chin” had his activities curtailed, and so on.
Then again, I’m not from anywhere near Nevada. Maybe those guys are more untouchable than the mob families on the East Coast that have been taken down.