Wisconsin's hotly-contested race to select its GOP candidate for the U.S. Senate is another battle between out-of-state Super PACs and Tea Party-associated nonprofits spending millions to convince election-weary voters to select their preferred candidate. The influx of outside spending is fueling a race to the right as candidates compete for the label of "true conservative." Here is a rundown of the groups spending big to influence Wisconsin's GOP primary.

In the 14 years that Paul Ryan has been a Congressman from Southeastern Wisconsin, he has never had a challenger of any stature or a race of any significance. Janesville, his hometown and the heart of the district, has no TV stations and only a handful of small, scrappy newspapers. What an opportunity for a man of the people to take the highroad!

If Americans who are embracing Rep. Paul Ryan's "Path to Prosperity" -- and that now includes Mitt Romney -- spent a few minutes reviewing a few recent research reports, they just might conclude that the Wisconsin Republican's plan to reduce the deficit might better be renamed the "Path to the Poorhouse" because of what it would mean to the Medicare program and many senior citizens.