U.S. President Donald Trump departed Washington for Switzerland to attend the World Economic Forum in Davos on Tuesday, when the Senate begins a historic impeachment trial.

“Heading to Davos, Switzerland, to meet with World and Business Leaders and bring Good Policy and additional Hundreds of Billions of Dollars back to the United States of America!” Trump said on Twitter. “We are now NUMBER ONE in the Universe, by FAR!!”

Trump is expected to give a speech and meet several leaders during the forum, including Iraqi President Barham Salih, Pakistani Prime Minister Imran Khan, Swiss Confederation President Simonetta Sommaruga and

Read more: Trump heads to Davos as Senate impeachment trial begins