The National Catholic Register's editorial urges anti-abortion voters to choose another candidate other than Giuliani.
"A Republican party led by a pro-abortion politician would become a pro-abortion party," according to the editorial that appears on the Web site and is set to appear next week in the newspaper's print edition.
Editors say "they hope that pro-lifers will 'be reasonable,' not let the perfect be the enemy of the good, and go along quietly," but "we won't."
"When they ask us to 'be reasonable' and go along with a pro-abortion leader, they assume that there is something unreasonable about the pro-life position to start with," the editors wrote. "We’re sorry, but we don’t see what is so unreasonable about the right to life.
"What looks supremely unreasonable to us is that we should trust a leader who not doesn’t only reject the right to life but even supports partial-birth abortion, which is more infanticide than abortion," according to the editorial.
Giuliani stated in 1999 that he doesn't see himself changing his position on allowing women the right to a partial-birth abortion, which occurs in the late term of a pregnancy. Last month, he told FOX News' Hannity & Colmes that he would support a ban on partial-birth abortion if it contained an exception for getting one if giving birth would endanger the life of the mother.
The editorial also warns that Giuliani's pledges to appoint judges like Justices Samuel Alito and John Roberts ring hollow.
"Would a pro-abortion president give us a pro-life Supreme Court justice? Maybe he would in his first term. But we’ve seen in the Democratic Party how quickly and completely contempt for the right to life corrupts. Even if a President Giuliani did the right thing for a short time, it’s likely the party that accepted him would do the wrong thing for a long time," the editorial reads.
Saying that parties often become cults of personality built around the president that leads it, the editors argue that if Republicans put an abortion rights nominee on the ballot, the party will lose "the gains they've built for decades."