Because she has more spine than any of the other members of her party.
The democrats under Nancy Pelosi.
Nancy Pelosi. On January 3rd, 2007, Rep. Pelosi became the first woman to rise to the position of Speaker of the House of Representatives. (She was also the first Italian-American to be elected Speaker.) Speaker Pelosi served through early 2011: after the Democrats lost the majority in the 2010 mid-term elections, she became the House Minority Leader.
Currently (Oct 2010) it is Rep. Nancy Pelosi of CA.
As of 2010 Nick Clegg is the leader of the LibDems
Nancy Pelosi became Speaker of the House initially in 2007 after the Democratic Party won control of the House of Representatives in the midterm elections. She was elected by her fellow Democrats, making history as the first woman to hold the position. After losing the majority in 2010 and serving as Minority Leader, she regained the Speakership in January 2019 when Democrats won back the House in the 2018 elections. Her leadership, fundraising abilities, and experience in Congress played significant roles in her ascent to this influential position.
The leader of the House of Representatives is called the Speaker of the House. As of October 26, 2010, the Speaker is Nancy Pelosi.
2010
Nick Clegg became Leader of the Liberal Democrats on 18th December 2007. He became Deputy Prime Minister on 11th May 2010.
2010
Nancy Pelosi
John Boehner.
For the current 111th Congress (2009-2010), the Democrats control both the House of Representatives (255-178) and the Senate (57-41-2).