Here is a link to a website with photos of pond scum.
Here is a list of expenditures, greatest first, by lobbyists in Minnesota.
It sure looks as if business interests are the biggest spenders.
__________UPDATE__________
Pond scum is not getting much current reporting, but Lobbying in Minnesota? Here. Here. I expect MinnPost and PiPress also are covering the lobbying cash, but after MPR and Strib, other reports likely would be cumulative. The table of spenders and amounts is the story in a nutshell.