Cady trains at NASA's Johnson Space Center

CNN's Carol Costello reports on hot topics stirring debate across the country. Just Sayin' aims to be provocative and encourage thoughtful discussion. Join the conversation.

• Is it weakness to try terrorists in civilian court?
• Is our military too 'P.C.'?
• Could distrust in government be a good thing?

What's a Wingnut? Someone on the far-right wing or far-left wing of American politics. In a polarized two-party system, they have disproportionate influence and too often define the terms of debate. With "Wingnuts of the Week," commentator John Avlon tries to take that power back.

• Avlon: 'Wingnut' in desperate bid for attention
• Avlon: 'Wingnut' literally locks out Republicans
• Avlon: 'Wingnuts' hit new low in health care debate

Send in your suggestions for Wingnuts of the Week