The book "Raven Rock: The Story of the U.S. Government's Secret Plan to Save Itself--While the Rest of Us Die" by Garret M. Graff contains the following passage:
When Wilson left America for the Paris Peace Conference, an absence that would stretch for months, Senator Lawrence Yates Sherman introduced a resolution to declare Wilson “absent” from office and install Vice President Thomas Marshall as the “acting” president until Wilson returned to U.S. shores. “It is a palpable violation of the act of 1790, approved by George Washington, to attempt to exercise the constitutional sovereign powers of the President within the domain of another government,” Sherman had thundered, saying, “The President of the United States is not its President in France; he is an alien there, a mere citizen of the Republic, shorn of all his sovereign powers.”
I have found references to Senator Sherman opposing the Versailles Treaty, and to an attempt to install Thomas Marshall as acting president after Wilson's stroke but I cannot find the aforementioned resolution, an act passed in 1790 that seems relevant, or another source for that quote. In short, I find this story highly dubious. Could anyone confirm or debunk this story?