Question: What number president is the person who had a feud with Megyn Kelly in her book Settle for More?

Context articles: Chasing Daylight (book)
Sunday Night with Megyn Kelly
Martha MacCallum
Settle for More
The Kelly File
The Live Desk
America Live with Megyn Kelly
Donald Trump
Tucker Carlson Tonight
Josh Mankiewicz

Chasing Daylight is a biography and a common-sense guidebook on how to embrace death without fear or sadness by Eugene O'Kelly, who is the Ex-Chairman and former CEO of KPMG, one of the largest U.S. accounting firms.
 The biography won, among other awards, the International Business Book Award from the Financial Times.
 The author, Eugene O’Kelly, was the CEO and Chairman of KPMG until being diagnosed with a terminal brain tumor at 53.
 He quit his job to settle his accounts with friends and family and write his book to convey how he lived the last 100 days of his life and make it the best time of his life.
Sunday Night with Megyn Kelly is an American television newsmagazine hosted by journalist and former attorney Megyn Kelly.
Martha MacCallum (born January 31, 1964) is a news anchor for Fox News.
 She joined the network in 2004.
 She previously hosted "The Live Desk" with Trace Gallagher and 'America's Newsroom' alongside Bill Hemmer.
 MacCallum was also often the fill-in anchor for Megyn Kelly while "The Kelly File" was still running.
 In January 2017, MacCallum became anchor of Fox News's temporary program, "The First 100 Days", which was later reformatted into a permanent show called "The Story with Martha MacCallum".
 MacCallum also had a weekly segment with Bill O'Reilly on "The O'Reilly Factor".
Settle for More is a 2016 autobiography written by American journalist and political commentator Megyn Kelly.
 The book discusses the unwanted sexual advances she received from Roger Ailes while working at Fox News, as well as her feud with then Presidential nominee Donald Trump.
The Kelly File was an American news television program hosted by journalist and former attorney Megyn Kelly on the Fox News Channel.
 The program is a spinoff of "The O'Reilly Factor", and focuses on late-breaking stories in a live format as well as news analysis and in-depth investigative reports interspersed with newsmaker interviews.
The Live Desk is an American news and talk program that aired on the Fox News Channel.
 It was cancelled and replaced with "America Live with Megyn Kelly".
America Live with Megyn Kelly is an American news program that aired on the Fox News Channel.
 The show aired from February 1, 2010 to late 2013, and was hosted by Megyn Kelly, former co-host of "America's Newsroom".
 It aired 1:003:00 PM Eastern Standard Time Monday through Friday.
Donald John Trump (born June 14, 1946) is the 45th and current President of the United States, in office since January 20, 2017.
 Before entering politics, he was a businessman and television personality.
Tucker Carlson Tonight is a current affairs program that first aired on November 14, 2016 and is hosted by Tucker Carlson on Fox News.
 It was created to replace the show "On the Record" due to Greta Van Susteren's departure from Fox News.
 Following Megyn Kelly's departure from Fox News, it was announced on January 5, 2017 that the show would be the replacement for "The Kelly File" on January 9, 2017.
 Martha MacCallum was named as his replacement in the 7 PM timeslot, with her show carrying the title "The First 100 Days".
 On April 19, 2017, it was announced that the show would take over "The O'Reilly Factor"'s 8:00 PM timeslot beginning April 24, following the cancellation of the latter program.
Joshua Paul "Josh" Mankiewicz (born August 27, 1955) is an American journalist, who has been reporting for "Dateline NBC" since 1995.
 He has also reported for "The Today Show" and "NBC Nightly News" with Brian Williams" and "Sunday Night" with "Megyn Kelly".
 Before moving to NBC, Mankiewicz worked as a producer and reporter for ABC News.