Wilson suffered a debilitating stroke in October 1919, after he had gone on a whirlwind tour in the United States to promote the League of Nations. He had suffered from high blood pressure for years. He had minor strokes a few times before, but nothing like the one in October 1919, which left the left side of his body paralyzed. For nearly a year and a half, Wilson could not function as president. First Lady Edith Wilson, his private secretary Joseph Tumulty, and physician Cary Grayson concealed the true nature of his illness.