Here are some of the most controversial things written by 2016 presidential candidates

Trump's 'Art of the Deal': A Campaign Blueprint?
Trump's 'Art of the Deal': A Campaign Blueprint?

The U.S. Constitution mandates three requirements for running for president. You have to be at least 35 years old, have lived in the U.S. for at least 14 years, and be a "natural born Citizen," (there is some ambiguity with this one, just ask Ted Cruz). Perhaps one unwritten requirement is that you have to author a book.

Writing a book is great way to jumpstart a political campaign. It provides a candidate with the bandwidth needed to properly layout their agenda for the country, while also allowing room to share personal experiences that may connect with voters. It's also a great opportunity to grab headlines.

Check out the other books by the 2016 presidential candidates:

Former Secretary of State Hillary Clinton released her book "Hard Choices" in 2014, and immediately made waves with her admission over her Iraq War vote. "I got it wrong. Plain and simple," Clinton admitted.

"I should have stated my regret sooner and in the plainest, most direct language possible. ... I held out against using the word mistake. It wasn't because of political expediency. ... [I]n our culture, saying you made a mistake is often taken as weakness when in fact it can be a sign of strength and growth for people and nations."

On the Republican side, Donald Trump used his latest book "Crippled America" to offer a candid look at his relationship with the media. "I use the media the way the media uses me—to attract attention. Once I have that attention, it's up to me to use it to my advantage," said Trump.

In "Art of the Deal," which according to Trump is the best-selling business book of all-time, The Donald revealed the key to his deal making proficiency. "My Style of deal-making is quite simple and straightforward. I aim very high, and then I just keep pushing and pushing and pushing to get what I'm after."

Former Republican presidential candidate and retired neurosurgeon Ben Carson made headlines when he compared gun control measures to Nazi Germany in his book "A More Perfect Union". "German citizens were disarmed by their government in the late 1930s, and by the mid-1940s, Hitler's regime had mercilessly slaughtered 6 million Jews and numerous others whom they considered inferior."

Carson would go on to double down on his controversial stance saying, "There are many countries where that has occurred where they disarm the populace before they impose their tyrannical rule."

Some politicians even use their books to weigh in on pop culture. Former Governor Mike Huckabee decided it was a good idea to attack Jay-Z in his book "God, Guns, Grits and Gravy," for "crossing the line from husband to pimp by exploiting his wife as a sex object."

As long as there are presidential elections, politicians will be writing optimally timed memoirs. No word yet on making this a requirement in the U.S. constitution.

Originally published