Oh no, it seems that Rob Quist under-reported his income in 2016 by $57,000. It could happen to any of us, you go to the bank and forget to add your deposit and all of a sudden you made $57,000 more than you thought. In 2016 he made $136,000, so not exactly knowing what average Montanans are going through as described in his commercials.
Look, I don't care about a person's income when deciding if they would be a good congressman or not. But if you can't keep track of your money how are you going to keep track of all of ours?