The 1904 United States presidential election in Idaho took place on November 8, 1904. All contemporary 45 states were part of the 1904 United States presidential election. State voters chose three electors to the Electoral College, which selected the president and vice president. As a result, Roosevelt was able to achieve the first-ever Republican victory in Idaho by an overwhelming margin – 40.38 percentage points – in the process emulating William Jennings Bryan’s 1896 sweep of all Idaho’s counties.