Mike Pence's relationship with Donald Trump 'broke down' after January 6. Here are other presidents and vice presidents who didn't get along.

• FDR's vice president was a Texas conservative who didn't support his New Deal legislation.
• Al Gore distanced himself from Bill Clinton after the president's affair with Monica Lewinsky.
• Donald Trump and Mike Pence's relationship "broke down" after the January 6 insurrection.

In a letter to his wife preserved by the National Archives, John Adams, the first vice president of the United States, once called the position "the most insignificant office that ever the invention of man contrived or his imagination conceived."