The Invisible Primary, 9/24

Tracking the GOP race to 2012

Ed Schultz has challenged Eric Cantor to a debate on health care; Public Policy Polling finds Mike Huckabee performing best in a speculative election matchup against Obama, taking 41 percent vs. Obama's 48, beating out Sarah Palin, Mitt Romney, and Jeb Bush; controversial Sheriff Joe Arpaio's planned attendance at a Romney fundraiser at Chase Field in Phoenix is reportedly costing Romney some support for the event; and Palin, in her speech in Hong Kong, pressed for deeper involvement in Afghanistan.