When the presidency and Senate are controlled by a different party from the one controlling the House, the speaker can become the de facto "leader of the opposition." Some notable examples include Tip O'Neill in the 1980s, Newt Gingrich in the 1990s, John Boehner in the early 2010s, and Nancy Pelosi in the late 2000s and again in the late 2010s and early 2020s. Since the speaker is a partisan officer with substantial power to control the business of the House, the position is often used for partisan advantage.