The North American Man-Boy Love Association (NAMBLA) was founded in December 1978 and is a Libertarian pedophile coalition group, many members have been convicted of pedophile offenses. Naturally because of what this organization represents, they often implore people to vote Republican.  They are not to be confused with the North American Marlon Brando Look-Alikes.
The organization consists of pedophiles in denial about the harm they do. Pedophiles as a group are notorious for refusing recognise that they are doing damage. The pedophiles also imagine or pretend that boys can “Freely choose” to love adult men. All this overlooks the power adults have to manipulate kids into doing what the adults want. In civilized countries the law protects underage boys and girls from the manipulative power of adults. Mark Foley acted like a member of this group, so liberals aren't inclined to support NAMBLA.