President Trump is set to embark on what he claims will be a "tremendous summit" with North Korean leader Kim Jong Un, but critics are skeptical that he'll be able to convince the millennial dictator to relinquish the country's nuclear weapons.After refusing U.S. aid at the Venezuelan border, President Nicolas Maduro faces new pressure from his opponents to step down, with the U.S. threatening to impose new sanctions.President Trump also faces challenges in his ongoing attempt to reach a trade agreement with China. Though he has delayed a March 1 deadline to increase tariffs on $200 billion in Chinese imports, the two sides have yet to sign an official agreement.Want to support 1A? Give to your local public radio station and subscribe to this podcast. Have questions? Find us on Twitter @1A.