Who is the only nationally elected official to be sworn in foreign soil?

Question

In the united states.
for US history

Answer 1

William Rufus King was nominated for Vice President while in the Senate, becoming the only sitting Senator to be nominated for the post, since he was then currently representing Alabama. However, King ended up serving as Vice President for a grand total of 4 weeks. He never assumed any formal VP-ish duties.

When he was nominated he was suffering from tuberculosis and alcoholism, and decided to go to Havana, Cuba - away from the cold winter in Washington - to try and recover. By the time of inauguration day he was too weak to travel to Washington, or even to stand up, so he was sworn in from Cuba, propped up by two aids, becoming the only US national politician to be sworn in on foreign soil. He then went home to Alabama 4 weeks later and died.

Answer 2

Only the President and the Vice President are nationally elected officials. All of them have been sworn in on American soil.