According to Roll Call (password protected), the Cornyn campaign "dismissed the charges of VoteVets.org as unfounded":
"The anti-war crowd is determined to use our men and women in uniform for their political advantage, even if our national security is jeopardized in the process," Cornyn campaign spokesman Kevin McLaughlin said.
What a bunch of jokers. Jim Webb and Chuck Hagel (who devised the new GI Bill), Rick Noriega (Cornyn's opponent), and VoteVets.org (whose veterans created the ad) have--not surprisingly--all served in a war. Yet *we're* the "anti-war crowd" according to the Cornyn campaign. However, John Cornyn--who was vehemently against serving in a war himself--is, I think, the real "anti-war" guy here, having avoided service during Vietnam.
VoteVets wasn't going to take this sitting down, and contacted Cornyn's office. And sadly, it's just more of the same.