Some said that the Republican Matt Rosendale was unable to connect with MT voters. Hence Tester forever in Big Sky Country!
There are exactly three reasons why Tester won any of his elections:
1. Obscene amounts of out-of-state (and probably illegal) campaign donations. (Tester outspent Rosendale by AT LEAST 5 to 1 ratio...if you can take the published figures as factual)
2. The absolute and undying love/support of Montana's sorry excuse for media for all things "D", with Tester and our lame*** Governor their current last grip on greatness/acceptance/whatever. (If I want accurate information about Montana I go to the 'net, local talkradio or have coffee with neighbors....and I'm damn sure not the only one does that.)
3. Vote fraud. Fine old Montana Democrat Party tradition. (This last election is rumored to have featured a significant number of ballots that were split [i.e. everything but the vote for Tester was for Republicans] as well as an election day registration/GOV drive at our two major college towns that one neighbor called the One doughnut/One Vote campaign, but that was the deciding factor in the published vote count.)
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Voter complaints? Check my Items 2 & 3. If you can even find someplace to file a complaint and the bureaucrat doesn't dump it in the trash before you're out of sight the trial lawyers and the media will brand you as a nutcase and drive you out of the state.
It's improving, but sometimes this place is worse than damn Chicago.