Sandra Day O'Connor (born on the 26th of March, 1930) is now a retired associate justice of the Supreme Court of the United States, serving from her appointment in 1981 by Ronald Reagan until her retirement in 2006. She became the first woman in the US history to be appointed to the Court. Before her appointment, O'Connor also served as the first US female Majority Leader.

On the 1st of July, 2005, she announced her intention to retire effective upon the confirmation of a successor. Samuel Alito joined the Court on the 31st January, 2006.

Considered a federalist and a Moderate Republican, O'Connor tended to approach each case narrowly without arguing for sweeping precedents. She most frequently sided with the court's conservative bloc, although in the latter years of her tenure, she was regarded as having the swing opinion in many cases.

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