During the 2016 United States presidential election, Sondland initially supported Donald Trump, but cancelled a fundraiser and repudiated Trump for his attacks on Khizr and Ghazala Khan.[2] In April 2017, it was revealed that 4 companies registered to Sondland donated $1 million to the Donald Trump inaugural committee.
On March 12, 2018, the Wall Street Journal reported that President Trump selected Sondland to be the next United States ambassador to the European Union.[29][30] On May 10, 2018, the White House announced that Sondland's nomination had been sent to the U.S. Senate.[31] He was confirmed by the Senate on June 28, 2018.[3] On July 9, 2018, Sondland presented his credentials at the European Commission and to President of the European Council Donald Tusk.[32]
Sondland's nomination received bipartisan support during his confirmation hearing before the Senate Foreign Relations Committee on June 21, 2018.[4] Both Sen. Ron Wyden (D-Ore.) and Sen. Thom Tillis (R-N.C.) testified in support of Sondland.[33] Sen. Wyden suggested that Sondland’s "family history is both fascinating and instructive as to why he has the experience and understanding to serve as the U.S. Ambassador to the E.U.," noting how his Jewish parents fled Nazi Germany before coming to the United States.