I heard it as well. Was in reference to him being in office for 17 months. He then joked to repeat the 17, saying he wished it was 17 years.
Jim Jordan is the chair of House Freedom Caucus. So his letter to POTUS is official request.
https://en.wikipedia.org/wiki/Freedom_Caucus
The House Freedom Caucus does not disclose the names of its members.[45] In the current (115th) Congress, the group has about three dozen members.[45] A number of members have identified themselves, or have been identified by others, as members of the Freedom Caucus, as of April 2018 including:
Mark Meadows of North Carolina
Justin Amash of Michigan
Joe Barton of Texas
Andy Biggs of Arizona
Rod Blum of Iowa
Dave Brat of Virginia
Mo Brooks of Alabama
Ken Buck of Colorado
Ted Budd of North Carolina
Warren Davidson of Ohio
Ron DeSantis of Florida
Scott DesJarlais of Tennessee
Jeff Duncan of South Carolina
Matt Gaetz of Florida
Tom Garrett Jr. of Virginia
Louie Gohmert of Texas
Paul Gosar of Arizona
Morgan Griffith of Virginia
Andy Harris of Maryland
Jody Hice of Georgia
Jim Jordan of Ohio
RaĂşl Labrador of Idaho
Alex Mooney of West Virginia
Gary Palmer of Alabama
Steve Pearce of New Mexico
Scott Perry of Pennsylvania
Bill Posey of Florida
Mark Sanford of South Carolina
David Schweikert of Arizona
Randy Weber of Texas
Ted Yoho of Florida
Chairs
Rep. Jim Jordan (OH-4), 2015–2017
Rep. Mark Meadows (NC-11), 2017–present