Republicans and Democrats are calling each other "brain dead," "un-American," "tools of special interests" and "enemies of the Middle Class," par for the course during midterm elections. But this year the stakes are nothing less than control of the Senate during President Obama's final two years. Kentucky, New Hampshire and Louisiana — states that don't always matter -- could help determine the course and content of presidential campaigns in 2016. The ultimate consequences couldn't be higher, for issues including Obamacare, the minimum wage — and your tax bill. We get a preview.