Warren mislabeled Sen. Jeanne Shaheen's (D-N.H.) state as Vermont.
Rep. Jeff Denham (R-Calif.) says Republicans will reach their goal of getting to 245 seats.
A spokeswoman said the changes will help the group "empower grassroots volunteers."
Dave Brat, who defeated Eric Cantor, is up against college colleague Jack Trammell.
Republicans edge Democrats as the party likely voters trust to handle issues.
Laura Barron-Lopez 10/28/14 10:52 AM EDT
The NASCAR driver appears in an ad warning about the costs of regulations.
Rep. Brad Schneider (D-Ill.) voted against all six budget proposals earlier this year.
House Republicans are looking to drive a wedge between former Rep. Gabrielle Giffords (D-Ariz.) and her former staffer, Rep. Ron Barber (D-Ariz.) in a new ad, part of their final TV salvo of the 2014 elections.
Priebus said the GOP would work to empower female candidates.
The endorsement is a boost for the Kansan as he struggles to shore up conservative support.