Akenaton: {{Some religious people feel that the abortion issue is of much more importance than Mr Obama's policies, or even the laws of the United States of America.}}
That's their right. But it doesn't follow that all members of their church, in good conscience, will agree with that stance.
And even the laws of the Catholic Church encompass far more issues than just abortion. If one considers all the Church's laws, a candidate who is "pro-choice" may support more of those principles than does another candidate who is "pro-life."
This priest is still, unequivocally, engaging in practices that violate the laws that give non-political charitable organizations tax-exempt status.