been a member of the court. Before 1981, the approval process of justices was usually rapid. From the Truman through Nixon administrations, justices were typically approved within one month. From the Reagan administration to the present, the process has taken much longer and some believe this is because Congress sees justices as playing a more political role than in the past. According to the Congressional Research Service, the average number of days from nomination to final Senate vote since 1975 is 67 days (2.2 months), while the median is 71 days (2.3 months). Recess appointments When the Senate is in recess, a president may make temporary appointments to fill vacancies. Recess appointees hold office only until the end of the next Senate session (less than two years). The Senate must confirm the nominee for them to continue serving; of the two chief justices and eleven associate justices who have received recess appointments, only Chief Justice John Rutledge was not subsequently confirmed. No U.S. president since Dwight D. Eisenhower has made a recess appointment to the court, and the practice has become rare and controversial even in lower federal courts. In 1960, after Eisenhower had made three such appointments, the Senate passed a "sense of the Senate" resolution that recess appointments to the court should only be made in "unusual circumstances"; such resolutions are not legally binding but are an expression of Congress's views in the hope of guiding executive action. The Supreme Court's 2014 decision in National Labor Relations Board v. Noel Canning limited the ability of the president to make recess appointments (including appointments to the Supreme Court); the court ruled that the Senate decides when the Senate is in session or in recess. Writing for the court, Justice Breyer stated, "We hold that, for purposes of the Recess Appointments Clause, the Senate is in session when it says it is, provided that, under its own rules, it retains the capacity to transact Senate business." This ruling allows the Senate to prevent recess appointments through the use of pro-forma sessions. Tenure Article Three, Section 1 of the Constitution provides that justices "shall hold their offices during good behavior", which is understood to mean that they may serve for the remainder of their lives, until death; furthermore, the phrase is generally interpreted to mean that the only way justices can be removed from office is by Congress via the impeachment