The White House today posted President Trump's Message on Yom Kippur (full text) which begins today at sundown. The message says in part:
As you observe this blessed day, my Administration is working to strengthen our proud national tradition of religious liberty, end faith-based persecution, and further the sacred cause of peace both at home and abroad.
We wish the Jewish faithful a meaningful Sabbath of Sabbaths. May you be inscribed in the Book of Life, may God bless you, and may He continue to bless the United States of America.