Answer:
Elected as a United States Senator November of 1972 was when Biden was elected to the United States Senate, but what was Sworn in (January 1973)
Elected to be the Vice President in 2008, with President Obama, and was sworn in on January of 2009
Elected to President of the United States on November 7, 2020, and January 20th, 2021 is when he was sworn in.
