The power of impeachment is granted to the House of Representatives under Constitutional law. In Article I, Section 2, the Constitution reads, "The House of Representatives shall chuse [sic] their Speaker and other Officers; and shall have the sole Power of Impeachment." Impeachment relates to the removal of a Government official due to crimes committed while that individual was in office.
All civil Officers of the United States that are tried and convicted for crimes such as bribery, treason, misdemeanors, and high crimes are all subject to impeachment. It is important to note that impeachment is a power that is granted to both Houses of Congress. The House of Representatives has the "sole Power" to impeach, while the Senate has the sole power to try those impeachments.
The House of Representatives is responsible to commence the impeachment proceedings. A member of the House can start the procedure by listing the charges against the official under oath or by asking for a referral to the appropriate committee of the House. In some cases, the impeachment process can begin by other officials outside of the Legislative Branch. However, the process to impeach will be carried out by the House of Representatives.