Updated (as promised): Projected for this Midterm Cycle
Koch Brothers vs. Top 10 Unions
Jon Stewart in his usual style on the Daily Show nails this issue squarely on the head.
Here is link to modified version of a Koch Ad that assumes it were re-filmed, true, and included the facts as we all mostly know them (e.g., the official Koch spending facts).
It's a real keeper for sure — also video follows - about 4 minutes - enjoy: