Ballotpedia, here.
Spoils of winning/holding office. Montana is part of the pack. Do you suppose the DCCC and RNCC get staff contributions? SuperPACs?
Is the public being served by public servants in such arrangements? Who do staff talk to besides lobbyists? Do lobbyist ranks consist in large measure of former staffers and former office holders? Is that good for the pubic? Is such a level of spending creating inertia against reform? Against progress?