That’s misdirection. The story was debunked.
Send me a link to where Cruz senior denied that he was involved with Oswald.
The campaign said that it wasn’t Rafael in the picture, and junior Cruz tried to joke it away, “ Yes, my dad killed JFK, he is secretly Elvis, and Jimmy Hoffa is buried in his backyard. “
And if you want to read what Cruz senior said in his own words (before the Kennedy assassination) about his work for Castro, read here:
http://newspaperarchive.com/profile/e-e-bud-kennedy/clipnumber/35480/