"(We) we have a moral obligation not to turn a blind eye to assaults on the collective dignity of humanity wherever they occur," the presumptive Republican presidential nominee said in a prepared remarks for a speech delivered at Oakland University in Rochester, Mich.

Ticking off instances of religious persecution worldwide, McCain pledged as president to "make respect for the basic principle of religious freedom a priority in international relations."

McCain has used several recent speeches to reassert his conservative credentials, addressing several issues the conservatives consider important: judges, guns and religion.

Concerning human trafficking, McCain said, as president he would establish an Inter-Agency Task Force on Human Trafficking and provide assistance to trafficking victims."

Regarding child pornography and child sexual exploitation cases in which predators use the Internet and e-mail to stalk and lure children, McCain said he'd promote intergovernmental and international cooperation. He also pledged to expand the list of companies required to report kiddie porn and impose higher fines and criminal penalties when they don't.

"(We) must be diligent in our active opposition to the enemies of human dignity in our own society and in all the dark corners of the world," he said.