Just like that, speculation over the 2020 presidential race just got louder.
Ohio Governor John Kasich is coming out with his fourth book. It's called "Two Paths: America Divided or United." It is due out April 25th.
The book is expected to draw contrasts between Kasich and President Donald Trump. Kasich only won one state in the Republican primary in 2016, but he stuck around until there were only three candidates left. After he dropped out of the race, Kasich did not endorse Trump. He also chose not to give a speech at the Republican convention, even though it was in his home state.
John Kasich through his career
John Kasich through his career
MT. PLEASANT, SC - FEBRUARY 10: Republican presidential candidate John Kasich talks to an overflow crowd outside of Finn's Brick Oven Pizza February 10, 2016 in Mt. Pleasant, South Carolina. The South Carolina Republican primary will be held Saturday, February 20. (Photo by Sean Rayford/Getty Images)
11/3/95 - Rep. John R. Kasich (R-OH), seated 2nd from left, and Sen. Pete V. Domenici (R-NM) in the dark suit standing, go over their response to President Clinton's radio address just prior to recording the radio broadcast in the Senate studio. Kasich was casually dressed as the House was out of session for the weekend. (Photo by Robert A. Reeder/The Washington Post/Getty Images)
D:\BOB\budget3.tif - slug: NA/BUDGET date: May 2, 1997 photog: Robert A. Reeder TWP The Rotunda of the Capitol description: GOP happy with their signed budget John R. Kasich (R-OH) is having a particularly good time during the GOP announcement of a new budget in the Rotunda of the Capitol. In front of him is Speaker Newt Gingrich. (Photo by Robert A. Reeder/The Washington Post/Getty Images)
P 350430 022 2May99 Manchester, Nh John Kasich (R-Oh), At The First-In-The-Nation Primary Kick-Off Weekend. (Photo By Jonathan Elderfield/Getty Images)
UNITED STATES - FEBRUARY 02: HOUSE ARMED SERVICES--John R. Kasich, R-Ohio, and Duncan Hunter, R-Calif., talk during House Armed Services Committee hearing on the president's fiscal year 2000 defence budget authorization budget request. (Photo by Douglas Graham/Congressional Quarterly/Getty Images)
Former Ohio congressman John Kasich attends the Republican National Convention at the Xcel Energy Center in St. Paul, Minnesota, Wednesday, September 3, 2008. (Photo by Harry E. Walker/MCT/MCT via Getty Images)
WASHINGTON, DC- Dec. 01: Governor-elect John Kasich, R-Ohio, and House Minority Leader John A. Boehner, R-Ohio, during a news conference after their meeting with other Republican members and governors-elect. Boehner is the presumed House Speaker for the 112th Congress. (Photo by Scott J. Ferrell/Congressional Quarterly/Getty Images)
John Kasich, governor of Ohio, speaks during a groundbreaking ceremony for the Cleveland Medical Mart and Convention Center in Cleveland, Ohio, U.S., on Friday, Jan. 14, 2011. The Cleveland Medical Mart and Convention Center will include a 100,000 square foot medical mart and an adjoining convention center with 230,000 square feet of exhibit hall space. The facility is expected to open in September 2013. Photographer: David Maxwell/Bloomberg via Getty Images
COLUMBUS, OH - MARCH 30: Ohio Governor John Kasich works long hours with staff on his new budget proposal at his office, in the Ohio State House office, Columbus, Ohio, Wednesday, March 30, 2011. Newly elected republican Ohio Governor John Kasich is working toward to balancing an Ohio budget in deficit through a budget proposal with extensive budget cuts, spending reform, and changes in labor laws, including restrictions on collective bargaining. (Photo by Melina Mara/ The Washington Post via Getty Images)
US Republican presidential candidate and former Massachusetts Governor Mitt Romney (2nd L) waves alongside Ohio Republican Senator Rob Portman (L) and Ohio Governor John Kasich (R) during a campaign stop at Tom's Ice Cream Bowl in Zanesville, Ohio, on August 14, 2012. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)
UNITED STATES - AUGUST 28: Ohio Gov. John Kasich speaks at the 2012 Republican National Convention at the Tampa Bay Times Forum. (Photo By Chris Maddaloni/CQ Roll Call)
COLUMBUS, OHIO - JULY 21: Ohio Governor John Kasich gives his speech announcing his 2016 Presidential candidacy at the Ohio Student Union, at The Ohio State University on July 21, 2015 in Columbus, Ohio. Kasich became the 16th candidate to officially enter the race for the Republican presidential nomination. (Photo by Ty Wright/Getty Images)
CONCORD, NH - FEBRUARY 09: Republican presidential candidate Ohio Governor John Kasich waves to the crowd after speaking at a campaign gathering with supporters upon placing second place in the New Hampshire republican primary on February 9, 2016 in Concord, New Hampshire. Kasich lost the Republican primary to Donald Trump, though he upset fellow Republican governors Chris Christie and former Governor Jeb Bush. (Photo by Andrew Burton/Getty Images)
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This book is likely to create some buzz around a possible primary challenge in 2020.
If history is any judge, a successful primary challenge to an incumbent President is very unlikely. Ronald Reagan challenged Gerald Ford in 1976. Ted Kennedy ran against Jimmy Carter in 1980. And, Pat Buchanan took on George H.W. Bush in 1992. None of them won their party's nomination.
Kasich, so far, has refused to comment one way or another when asked about the possibility of a primary run..