Shirley Williams' "untidy" image endeared her to many women, and she was still regarded as a future Labour leader. However, in 1981, unhappy with the influence of the far left, she resigned from the party along with Roy Jenkins, David Owen and Bill Rodgers, to form the SDP. In the same year she was elected the party's first MP. Despite becoming President of the new party, she lost her seat in 1983. The party merged with the Liberal Party in 1988, and she supported the change. She married Harvard academic Richard Neustadt, moved to the USA, and effectively retired from politics. She returned to politics as a life peer with the title Baroness Williams of Crosby in 1993, and in 2001 became the Leader of the Liberal Democrats in the House of Lords. She is on the Advisory Council of the Institute for Public Policy Research.