A February 9–13, 2007 by the American Research Group showed Oklahoma Republicans preferred Rudy Giuliani, 37%, over John McCain, 21%.

[4] Three months later, a May 16, 2007 Tulsa World/KOTV poll showed Rudy Giuliani, 32%, retained his lead over John McCain, 23%.

[5] By December 2007, Mike Huckabee had started to make headway in both national polling and in Oklahoma.

A December 16–19, 2007 Tulsa World/KOTV poll showed Mike Huckabee 29%, John McCain 17%, and Rudy Giuliani 11%.

[8] With just two days before the Oklahoma Republican primary, another Survey USA poll showed John McCain retained his lead at 37% and Mike Huckabee at 32%.