This is classic: Duncan Hunter previously blamed his wife for $250,000 worth of campaign conversion of funds. Now he's claiming that it's all political, and says the media should leave his wife and family out of it! Can't have it both ways, Duncan...
Misspending campaign money on personal stuff is a minor offense that normally just requires paying back the money and paying a fine. But what gets people in real trouble is if they tried to conceal it. Which Hunter and his wife did by labeling certain personal expenses as legitimate campaign expenses, even though there was no justification for that. Fancy dinners, family trips to Disney, etc.
It's not the crime that gets you. It's the cover-up.