From presidential nomination to the Embassy: On May 9, Mr. David B. Cornstein, President Trump’s nominee as U.S. Ambassador to Hungary, had his hearing before the Senate Committee on Foreign Relations. You can read his Statement here: http://ow.ly/eEKm30jVpGG (PDF file). What comes next? Our Prezi explains the steps presidential nominees have to take until they become Ambassadors and arrive in the host country to lead the U.S. Mission..