Sheldon Adelson is the tip of the iceberg

At least we know his name. At least we know who David and Charles Koch are. At least we know the names of Barack Obama's 2008 Wall Street contributors.

In this election cycle, we will never know, thanks to Mitch McConnell (R-double talk) and, yes, Scott Brown (R-whenever you need me, Mitch).

(h/t Salon)