The president is the chief diplomat of the United States. One of his most important diplomatic powers is to recognize foreign governments. When the president receives foreign diplomats, he endorses them in the public's eye.This helps the world view the country's government as legitimate and helps in establishing diplomatic relations and signing treaties with that country.owers and Functions. The Constitution gives the president the powers to recognize foreign governments and make bilateral or multilateral treaties. He usually must get advice and consent of the Senate, but in some cases he makes agreements with other countries without congressional approval.