In September 2017, President Donald Trump nominated Grenell to become the United States Ambassador to Germany.[31] After a significant delay, the Senate confirmed Grenell 56–42 on April 26, 2018.[32][33] Grenell was sworn in by Vice President Mike Pence on May 3, 2018,[34] making him the highest-ranking openly gay official ever in a Republican administration.[35] Grenell was also under consideration for the posts of U.S. Ambassador to NATO and United States Ambassador to the United Nations.[36][37]