Republican presidential candidate Mitt Romney will headline the National Journal’s first show on XM Satellite Radio's POTUS '08 channel, set to debut tomorrow at 1pm ET.

"National Journal On Air" will also be available on the National Journal’s web site as either a live stream or as podcasts of the show. (Interesting, XM is really pushing this "free to air" concept...)

In addition to Mitt Romney, tomorrow's show also will feature National Journal political writer Jim Barnes, National Journal White House correspondent Carl Cannon, and Senior Editor of The Hotline, John Mercurio.

National Journal Group, through it's partnership with XM Satellite Radio, will host "National Journal On Air" every Friday from 1-2pm ET on XM's POTUS '08 (ch 130).