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President pro tempore of the United States Senate - Wikipedia
About the President Pro Tempore - U.S. Senate
List of presidents pro tempore of the United States Senate
About the President Pro Tempore | Historical Overview - U.S. Senate
President pro tempore - Wikipedia
About the President Pro Tempore | Presidents Pro Tempore - U.S. Senate
Sen. Patty Murray becomes first female president pro tempore - NBC News
Murray becomes first female president pro tempore in Senate
Patty Murray becomes 1st female Senate president pro tempore