This recent first lady is well known for her programs advocating for increased diet and exercise for children.
Michelle Obama
This young hunk was in the Navy 
John F. Kennedy
This furry guy is named after this president
Theodore "Teddy" Roosevelt
This president was responsible for the Watergate scandal
Richard Nixon
First Name: King ____ Bible
Last Name: Famous Orange Cat who hates Mondays
James Garfield
This famous first lady was known as the "legs" of her husband. 
Elanor Roosevelt
This young actor would become president after his thespian career had ended.

Ronald Reagan
This president has a car and a constructive children's toy named after him
Abraham Lincoln
This president claims that nothing happened between him and a certain white house intern
First Name: _____ and Hobbes
Last Name: Synonym for Chill + common suffix for group
Calvin Coolidge
She was the first first lady
Martha Washington
This young Delawarean was a lawyer 
Joe Biden
This president made a cameo in the Home Alone film franchise.
Donald Trump
This president (allegedly*) sold weapons to Iran to fund contra group in Central America
Definitely*
Ronald Reagan
First name: Tree material + what you do to accelerate a boat
Last Name: Male Child of The Fresh Prince of Bel-Air
Woodrow Wilson
This first lady sadly passed away last year at the age of 96. She was highly acclaimed for her work in charity.
Rosalynn Carter
This young man wrestled at Harvard

Teddy Roosevelt
This popular candy bar was named after president Grover Cleveland's daughter
Baby Ruth
This president known as "Old Hickory" had a scandal, because his wife was previously married and got divorced (It was the old days)
Andrew Jackson
First Name: Long version of synonym for "Wealthy"
Last Name: British slang for steal + Male Child
Richard Nixon
The wife of the "Father of the Constitution", this first lady is known for her heroics in preserving the white house during the War of 1812. Also, the only first lady to be taller than her husband. 
Dolley Madison
This president's middle name was just S. It's not an initial, it was literally his name.
Harry S. Truman
This large president started the baseball tradition of the "7th Inning Stretch" when a crowd of baseball fans followed his lead in 1910.
William Howard Taft
Warren G. Harding
First Name: James Joyce Novel and Roman Hero
Last Name: To permit
Ulysses (S.) Grant