Washington (8)

Adams (4)

Jefferson (8)

Madison (8)

Monroe (8)

Adams (4)

Jackson (8)

Van Buren (4)

Harrison (~0; died of pneumonia after 1 month)

Tyler (~4; completed Harrison’s term)

Polk (4)

Taylor (~1; died of a stomach ache)

Fillmore (~3; completed Taylor’s term)

Pierce (4)

Buchanan (4)

Lincoln (~4; re-elected, assassinated)

Johnson (~4; completed Lincoln’s second term)

Grant (8)

Hayes (4)

Garfield (~0; assassinated)

Arthur (~4; completed Garfield’s term)

Cleveland (4)

Harrison (4)

Cleveland again (4 (8 total))

McKinley (~4; re-elected, assassinated)

Roosevelt (~8; completed McKinley’s second term, re-elected)

Taft (4)

Wilson (8)

Harding (~2; died of a heart attack)

Coolidge (~6; completed Harding’s term, re-elected)

Hoover (4)

Roosevelt (~12; three full terms, died of a brain hemorrhage in fourth)

Truman (~8; completed Roosevelt’s fourth term, re-elected)

Eisenhower (8)

Kennedy (~2; assassinated)

Johnson (~6; completed Kennedy’s term, re-elected)

Nixon (~5; re-elected, resigned)

Ford (~3; completed Nixon’s second term)

Carter (4)

Reagan (8)

Bush (4)

Clinton (8)

Bush (8)

Obama (8)

Trump (4)

Biden (ongoing)

We’ve never had a run of four two-termers in a row, and we’ve never made it more than eight presidencies without an irregular transition; we’re overdue, if you’re superstitious.

Adams 2 and 6 were father and son.

Harrison 9 and 23 were grandfather and grandson.

Johnson 17 and 36 were unrelated.

Roosevelt 26 and 32 were fifth cousins once removed.

Bush 41 and 43 were father and son.

"Look, I view myself as a bridge, not as anything else," Biden said in 2019. "There is an entire generation of leaders you saw stand behind me."

He later said, "I may end up, if I get elected, only having one term."

He said that out loud in 2019.