It is worth noting that the WC did not interview James Tague until July 23, 1964, when the Warren Report was already in draft form, and that the interview only happened because a week or so earlier Dallas reporter Tom Dillard had asked the U.S. Attorney for North Texas, Harold Sanders, a question about the Tague wounding during a public appearance, and Sanders had then sent a registered letter about the wounding, including a photo, to the WC's chief counsel, J. Lee Rankin.
This gives us a good idea of how determined the WC was to ignore the Tague wounding.
Also, understanding the state of the investigation up to that point helps us futher understand the WC's reluctance to interview Tague.
The FBI had already submitted its massive report on the assassination to the WC. The FBI report contradicted the final version of the Warren Report on some crucial subjects. This is undoubtedly why the WC, amazingly, did not include the FBI's report in its 26 supplemental volumes.
The FBI report rejected the single-bullet theory (SBT), said there were no missed shots, and said all three bullets hit Kennedy or Connally. The FBI report also said that JFK's back-wound bullet entered at a much steeper angle than the WC posited, an angle so steep that the bullet could not have exited JFK's throat, hence the FBI's rejection of the SBT.
To make matters worse for the WC, the Secret Service agreed with the FBI's shooting sequence! Both the FBI and Secret Service analyses ignored the Tague wounding.
Interestingly, when the conflicts between the Warren Report and the FBI report finally surfaced in 1966, none other than J. Edgar Hoover insisted the FBI's version was correct!
Of course, we now know that there was a third official version of the shooting, i.e.., the CIA analysis. Shortly after the assassination, CIA analysts studied the Zapruder film and concluded that the first shot did not come from the sixth-floor window and that more than one gunman was involved. The WC was probably not aware of the CIA analysis. The CIA's conclusions only came to light thanks to the ARRB in the late 1990s.
Anyway, the FBI and Secret Service analyses of the shooting help us understand why the WC was so determined to ignore the Tague wounding. If U.S. Attorney Sanders had not been asked about the wounding in a public appearance, and if Sanders had not then sent a registered letter and photo to Rankin, it is almost certain the WC never would have interviewed Tague.
For Arlen Specter, being forced to acknowledge the Tague wounding left him no choice but to go with the ridiculous SBT. As we now know, three of the seven members of the WC rejected the SBT, but the public did not know this until years later because Rankin refused to allow any mention of this substantial dissent to appear in the Warren Report.
Dr. Gerald McKnight, a professor of history at Hood College, discussed all of these facts in his 2005 book Breach of Trust: How the Warren Commission Failed the Nation and Why.