Some news sources report that Queen Elizabeth met with every U.S. president since Harry Truman, with the exception of Lyndon Johnson.
Inasmuch as Elizabeth met with Truman, it should be said that she met with every U.S. president since FDR, with the exception of LBJ. That’s because since refers to the period of time after a specified event.
But it takes too much thought on the part of history-challenged Americans to conjure the meaning of the Queen’s having met with every U.S. president since FDR, with the exception of LBJ.
Therefore, one of these correct and computable statements will have to do:
The Queen met with every U.S. president since FDR, with the exception of LBJ.
The Queen met with Truman and every subsequent president, with the exception of LBJ.
The Queen met with 13 U.S. presidents, from Truman to Biden, with the exception of LBJ.
Why didn’t the Queen meet with LBJ? There’s a lot of speculation about that. My guess is that she didn’t especially want to meet the man, and rightly considered Princess Margaret to have been an adequate surrogate.