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President Donald Trump entered office in 2017 vowing a dramatic shift in U.S. foreign policy and national security. Four years later, President Joe Biden offers a return more in sync with President Obama’s worldview. H.R. McMaster, the Hoover Institution’s Fouad and Michelle Ajami senior fellow and a former Trump National Security Advisor, offers his thoughts on the effectiveness of the Trump approach and what to expect from the anticipated Biden “re-pivot” on China and Iran.