Proposition 1: One should not vote for those who support grave evils.
Proposition 2: One should not vote for those who support intrinsic evils.
Proposition 3: Via prudential judgement, there may be divergent views on whether a given act is a grave evil.
Proposition 4: Two Popes and all the U.S. bishops to varying degrees in their prudential judgement have concluded the Iraq war is unjust.
Therefore, the only people in good conscience who may vote for either of the two candidates with a chance of winning the presidency – discounting embryonic stem cell research – are those whose conscience hasn’t conformed to the beliefs held by the ordinary magisterium. Discuss.