Russia, Russia, Russia
In Opensecrets, under foreign lobby watch I see that Sidley Austin filed foreign registration in 2015 for VTB bank of Russia.
This may be the same VTB bank that was reportedly going to finance the Trump Tower in Russia per an article in Daily Beast. VTB denies this. That was also in late 2015.
It seems suspect that Sidley Austin would register to lobby on behalf of Russia w/ congress in regards to Hussains sanctions.
Seems plausible. "Fired" was my first thought but I couldn't recall the teacher story.