Answer:
Article 1, Section 3.
Step-by-step explanation:
Article 1, Section 3 of the United States Constitution states that the House of Representatives are authorized to impeach a President.
Impeachment, in terms of this article means, that if any central governmental officer is found acting improperly, that is, in acts of crime, shall be impeached (charged) by the House of Representatives furthermore, if his charges are found to be true and the officer convicted of the crime, then he/she shall be removed from the office.
Article 1, Section 3 of the US Constitution states that 'the Senate have solitary power to try all impeachments and that a person will be held convicted with the majority of two-third votes of the members.'
Therefore, the principle of the rule of law that the given scenario presents is Article 1, Section 3.