Incumbent	John Warner
Party	Republican
Seeking Re-election?	Most Likely, despiteMaybe age (See personal statement here)
Candidate Website	Senate Website
Other Resources	Congresspedia profile on John Warner

Potential Challenger	Mark Warner
Party	Democrat
Source of Information	CW/Personal Statements
Candidate Website	Forward Together PAC

Potential Challenger	Governor Tim Kaine
Party	Democrat
Source of Information	Speculation
Website	VA Governor Website

Potential Challenger	Tom Davis
Party	Republican
Source of Information	Candidate interviews (see here and here) Roll Call
Candidate Website

Potential Challenger	George Allen
Party	Republican
Source of Information	Rumor/Speculation (see here)
Candidate Website	Senate Website

Potential Challenger	Jim Gilmore
Party	Republican
Source of Information	Statement (though he or the reporter is confused about when Warner's term is up)
Candidate Website

Potential Challenger	Gail Parker
Party	Independent/Green
Source of Information	Speculation
Candidate Website

Background Information

John Warner currently sits on the Senate Armed Services Committee, Environment and Public Works Committee, Senate Committee on Homeland Security and Governmental Affairs, and Senate Committee on Intelligence.

Local Blogs
Raising Kaine