Allow the president to invade a neighboring nation, whenever he shall deem it necessary to repel an invasion, and you allow him to do so whenever he may choose to say he deems it necessary for such a purpose - and you allow him to make war at pleasure. ↗
High school teachers who want to get reluctant readers turned around need to give the students some say in the reading list. Make it collaborative: The students will feel ownership, and everyone will dig in. ↗