Final answer:
The 20th Amendment of the United States Constitution, also known as the Lame Duck Amendment, changes the start date of the President's term.
Step-by-step explanation:
The 20th Amendment of the United States Constitution, also known as the Lame Duck Amendment, primarily addresses the terms of the President and Congress. In relation to the Executive branch, it states that the President's term begins on January 20th following the election, rather than March 4th as stated in the original Constitution.
Learn more about 20th Amendment and the President of the United States