I would primarily suggest Problem? Solved!, but judging from experience I suspect their intellectual development might be more equipped to handle Indy Pindy, The Liberty Mouse. On the other hand, Kent's Liberty Primer might be good for a Ruler or prospective Ruler with a more mature mind, but a relatively short attention span. Tao Liberty Ching would probably be good for those who have no attention span at all and can only think in sound-bite sized servings. Or those with a more philosophical bent. If all else fails and you still want to inflict me on some politician, or if you have no complaints with the direction he/she seems to be leaning, you could send them Sandy's Legacy.
This way you could help yourself by spreading the liberty meme while also helping me. You might even help that politician become a productive individual rather than a parasite.