D. Launching a filibuster
Filibustering has long been a source of outside interest for the US Senate. Traditionally, 60 votes or a "supermajority" are needed to vote to end a filibuster. In 2013, Sen. Harry Reid pushed for an amendment that would require only a simple majority when it came to judicial and executive branch nominees (the Senate's Advise and Consent role) and the Republicans recently expanded this to the Supreme Court.