In the United States, the Senate is the branch of the legislature that approves presidential appointments. Clause 2 of Section 2 of Article 2 of the U.S. Constitution guarantees the Senate's power to give "Advice and Consent" to presidential appointments.
As of 2014, there are approximately 1,000 appointed positions that require approval from the Senate. These positions include cabinet secretaries, under-secretaries and assistant secretaries, Supreme Court justices, ambassadors, U.S. attorneys and many other positions. In 2013, the U.S. Senate changed its rules on appointments, opting to make all appointments except those to the Supreme Court subject to a majority vote. This allowed them to avoid filibusters on nominees, which had clogged up the process, leaving many positions vacant.