Under what circumstances, if any, would you support the United States joining the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP), formerly the Trans-Pacific Partnership?

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?

Do you support a two-state solution to the Israeli-Palestinian conflict and, if so, how would you go about trying to achieve it?