With Huckabee out, Iowa has gotten more interesting and the race to be the not-Romney has lost another big name.
Haley Barbour (4/25/11) Jim DeMint (3/24/11) Mike Huckabee (5/14/11) George Pataki (4/20/11) Mike Pence (1/27/11) John Thune (2/22/11)
Buddy Roemer (exploratory: 3/3/11)
1 Christie and Bush (and to a lesser degree Perry and Jindal) continue to be listed as "undecided", despite their rather constant stream of noes, simply because they continue to be asked. Admittedly time is running out and the noes will become much more definitive relatively soon.
Thanks to Mystery Politico for the Pataki news. FHQ missed it entirely.