They'd like him to pick a position on torture and stick to it:

Senator John McCain was once a principled leader in the fight against torture. But then something happened. In 2006, he lended instrumental support to the Military Commissions Act, which among other things granted retroactive amnesty for past acts of torture and allowed for secret evidence collected during harsh interrogations. Then this past February, he voted against explicating banning the CIA from engaging in torture.

As Catholics we have a special obligation to work against torture. The Catechism of the Catholic Church states that: “Torture which uses physical or moral violence to extract confessions, punish the guilty, frighten opponents, or satisfy hatred is contrary to respect for the person and for human dignity.” Furthermore, torture violates the dignity of both the victim and the perpetrator.

Never again should our country engage in such immoral behavior. With your help, lets make it clear that torture is never morally justified.

Don't miss the video testimony from Josh Casteel:

Pretty much. McCain sold out his principles and his fellow POW's on this issue, which ought to tell you just how deep his commitments run. But he should be reminded of it, early and often.