vote in committee to block a nomination, prior to 2017 a nomination could be blocked by filibuster once debate had begun in the full Senate. President Lyndon B. Johnson's nomination of sitting associate justice Abe Fortas to succeed Earl Warren as Chief Justice in 1968 was the first successful filibuster of a Supreme Court nominee. It included both Republican and Democratic senators concerned with Fortas's ethics. President Donald Trump's nomination of Neil Gorsuch to the seat left vacant by Antonin Scalia's death was the second. Unlike the Fortas filibuster, only Democratic senators voted against cloture on the Gorsuch nomination, citing his perceived conservative judicial philosophy, and the Republican majority's prior refusal to take up President Barack Obama's nomination of Merrick Garland to fill the vacancy. This led the Republican majority to change the rules and eliminate the filibuster for Supreme Court nominations. Not every Supreme Court nominee has received a floor vote in the Senate. A president may withdraw a nomination before an actual confirmation vote occurs, typically because it is clear that the Senate will reject the nominee; this occurred with President George W. Bush's nomination of Harriet Miers in 2005. The Senate may also fail to act on a nomination, which expires at the end of the session. President Dwight Eisenhower's first nomination of John Marshall Harlan II in November 1954 was not acted on by the Senate; Eisenhower re-nominated Harlan in January 1955, and Harlan was confirmed two months later. Most recently, the Senate failed to act on the March 2016 nomination of Merrick Garland, as the nomination expired in January 2017, and the vacancy was filled by Neil Gorsuch, an appointee of President Trump. Once the Senate confirms a nomination, the president must prepare and sign a commission, to which the Seal of the Department of Justice must be affixed, before the appointee can take office. The seniority of an associate justice is based on the commissioning date, not the confirmation or swearing-in date. After receiving their commission, the appointee must then take the two prescribed oaths before assuming their official duties. The importance of the oath taking is underscored by the case of Edwin M. Stanton. Although confirmed by the Senate on December 20, 1869, and duly commissioned as an associate justice by President Ulysses S. Grant, Stanton died on December 24, prior to taking the prescribed oaths. He is not, therefore, considered to have