The Racing Form (pt. 4)
With Sen. Sam Brownback's announcement, the Wall Street Journal's Circling the Oval Office has been updated.
Update: And for Gov. Bill Richardson's exploratory committee.
Second Update: CQ Politics has a list, the "2008 White House Derby: The Field So Far." The list was last updated on Saturday before Brownback and Richardson announcements.
If someone knows of a frequently-updated chart on the Internet with links to these candidates' websites, please let me know. I will link to it.