Final answer:
The House of Representatives has the power to impeach the president with a simple majority vote. The Senate holds the trial, and a two-thirds majority vote is required for conviction and removal from office.
Step-by-step explanation:
The body that has the power to impeach the president is the House of Representatives. A simple majority vote in the House is required to impeach the president. Once the House of Representatives votes to impeach, the Senate has the sole power to try the impeachment. For the president to be removed from office, a two-thirds majority vote in the Senate is necessary. During the trial, the Chief Justice of the United States presides over the Senate. It's important to note that impeachment in the House is merely the accusation, whereas the trial in the Senate decides whether or not to convict and therefore remove the president from office.