I reluctantly voted for Perry and Cornyn because there wasn't any better choice and because I vote to mitigate the evils of government by electing the candidate who will inflict the least harm to myself and my wallet, not to gain control of the ring of power. I won't be making that same mistake ever again with Perry, and if somebody better will challenge him in 4 years I'll work against Cornyn too.
My point: That we elected those officeholders doesn't mean we have to approve of their endorsements. A soldier on the battlefield wields his sword at his attacker not because he personally desires to harm him among untold thousands of other attackers on that same field but rather because his failure to do so will result in his attacker rendering the same in reverse upon him. He therefore fights of necessity to preserve himself against a percieved evil in the enemy. He uses the sword because it is a tool to mitigate against the harm that others will inflict upon him. Just the same, the ballot box is our tool to mitigate, however small a degree it may be in, against the harm inflicted upon us by government.