As Ted Cruz's father rallies to help his son win the evangelical vote in Indiana, Donald Trump is hitting back hard with questions about why the elder Cruz has been linked to Lee Harvey Oswald.

Trump voiced his disapproval for Rafael Cruz's attempts to recruit evangelicals for his son, saying, "I think it's a disgrace that he's allowed to do it."

Trump then alluded to the National Enquirer article that featured a photo of a man appearing to be Rafael with the JFK assassin.

"His father was with Lee Harvey Oswald prior to Oswald's being — you know, shot. I mean, the whole thing is ridiculous," Trump told Fox News. "What is this, right prior to his being shot, and nobody even brings it up. They don't even talk about that. That was reported, and nobody talks about it."

The Enquirer article cites a 1963 photograph that shows Oswald and a man alleged to be the elder Cruz dispensing propaganda about Fidel Castro.

Rafael, who is now a pastor, has been previously linked to Castro. He was supposedly eager to fight alongside Castro's guerrilla army in the 1950s. Ted Cruz wrote in his book, A Time For Truth that his father "asked if he could join Castro in the mountains and keep fighting."

Cruz's campaign called the link to Oswald "another garbage story in a tabloid full of garbage." They went on to call the story "false" and said that the person in the photograph is not Rafael Cruz.