Would you commit to the full withdrawal of U.S. troops from Afghanistan by the end of your first term, or would you require certain conditions be met before doing so?

Would you sign an agreement with North Korea that entailed partial sanctions relief in exchange for some dismantling of its nuclear weapons program but not full denuclearization?

How would you discourage the proliferation of coal-fired power plants in developing countries?

What, if any, additional steps should the United States take to remove Nicolas Maduro from power in Venezuela?