“He is a man of his most recent word”

Conservative columnist William F. Buckley, Jr. (1925-2008) said in August 1965 about President Lyndon B. Johnson:
 
“He is a man of his most recent word.”
 
A “man of his word” is someone who keeps his word. A “man of his most recent word” changes his mind. Buckley’s words have been used by others against other politicians.
 
 
Wikipedia: William F. Buckey, Jr.
William Frank Buckley, Jr. (November 24, 1925 – February 27, 2008) was an American conservative author and commentator. He founded the political magazine National Review in 1955, which had a major impact in stimulating the conservative movement. He hosted 1,429 episodes of the television show Firing Line (1966–1999) where he became known for his transatlantic accent and wide vocabulary. He also wrote a nationally syndicated newspaper column and numerous spy novels.
 
10 August 1965, The Delta Democrat-Times (Greenville, MS), “On the Right: Johnson At One Time Supported Taft-Hartley” by William Buckley, pg. 4, col. 3:
There were others (me, for instance), who doubted that President Johnson would do any such thing. He is a man of his most recent word, and that one was firmly given to the labor unions in 1964—that is they gave him their enthusiastic help he would do his best to deprive the people of 19 states of the Union of their right to permit a man to work without joining a labor union.
 
23 September 1970, Reno (NV) Evening Gazette, “Letters to the Editor,” pg. 4, col. 5:
The senator, a man of his most recent word, has recently been dribbling off into vacuities (where he’s greatly at home) about his seniority.
(...)
LOUIS P. RICKS, JR.
SHARON SUE WILLIAMS
Executive Board,
Freedom Corps
 
27 January 1981, Dallas (TX) Morning News, “Clements’ programs assailed as contradictory” by Sam Kinch Jr.,
“He’s always a man of his most recent word,” Doggett said of Clements.
(State Senator Lloyd Doggett of Austin on Texas Governor Bill Clements.—ed.)
 
Google Books
William F. Buckley, Jr., Patron Saint of the Conservatives
By John B. Judis
New York, NY: Simon and Schuster
1988
Pg. 263:
Johnson, Buckley quipped, was “a man of his most recent word.”
 
Google News Archive
26 March 2002, Bangor (ME) Daily News, “Bush,” pg. A2, col. 2:
“Once again, we see that George W. Bush is a man of his most record word,” Democratic National Committee Chairman Terence McAuliffe charged last month.
 
Google Books
The Mammoth Book of Insults
By Geoff Tibballs
New York, NY: Little, Brown Book Group
2011
Pg. ?:
(of Lyndon B. Johnson) He is a man of his most recent word. – William F. Buckley Jr.