Non-Political Presidential Trivia Question

[silverscreenselect]

At 5' 4" tall, Kamala Harris would move into a tie for the shortest US President if elected. Which President is (or was) the shortest?

Spoiler

James Madison at 5' 4"

Other short presidents:

Martin Van Buren 5 '6"
Benjamin Harrison 5' 6"
William McKinley 5' 7"
John Adams 5' 7"
John Q. Adams 5' 7 1/2"