Final answer:
The House of Representatives is the body that initiates impeachment proceedings. The Senate holds the trial post-impeachment, requiring a two-thirds majority vote for conviction and removal of the official in question.
Step-by-step explanation:
Any effort to initiate impeachment proceedings must be done by the House of Representatives.
The U.S. Constitution grants the House of Representatives the exclusive power to impeach, or formally accuse, the President or other federal officials, including members of the judiciary.
Following the impeachment by the House, the Senate is responsible for holding the trial to decide whether the official should be removed from office. This trial is presided over by the Chief Justice of the Supreme Court if the President is the one being tried.
A two-thirds majority vote is required in the Senate to convict and thus remove the official from office.