New book claims James Buchanan was the 'Worst. President. Ever.'

Now that Donald Trump is set to become the 45 president of the United States there's been a lot of discussion about the history and tradition of the executive office. Back in August, Trump himself called President Barack Obama the "worst president" in U.S. history.

Well, a new book says otherwise.

According to the newly released book "Worst. President. Ever.," that esteemed title belongs to James Buchanan, the 15th president of the United States.

Author Robert Strauss says while Buchanan may be the "worst" president ever, he was also heavily influential in American history. "Buchanan is the second-most consequential American - Washington being the first. Washington started everything or led the start to everything. And Buchanan led us into demise"

A review by Kai Bird, author of The Good Spy, says Strauss' book "has turned the story of James Buchanan—indisputably the Worst. President. Ever—into a fascinating tale on the triumph of mediocrity."

"Worst. President. Ever." was released on October 1, 2016. You can order it here.