Peter Overby, power, money and influence correspondent, NPR
Sean Parnell, president, Center for Competitive Politics
Ezra Klein, economic policy blogger, The Washington Post
A 2010 Supreme Court ruling has made it easier for corporations and unions to spend to influence campaigns, while regulations also enable them to hide the source of that spending. So much cash is now flowing to both parties that the 2010 election is on track to be the expensive midterm in history.