Republican presidential hopeful TedCruzlashed out at rival candidate DonaldTrumpon the day of Indiana's primary on Tuesday, calling him a pathological liar, narcissist and bully after the front-runner linkedCruz's father to John F. Kennedy's assassin.

"I'm going to tell you what I really think of DonaldTrump. This man is a pathological liar. He doesn't know the difference between truth and lies,"Cruztold reporters in a scathing indictment.

"He lies practically every word that comes out of his mouth. And...his response is to accuse everybody else of lying."

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In a television appearance earlier,TrumplinkedCruz's father, RafaelCruz, to Kennedy assassinLeeHarveyOswald, citing a report by National Enquirer, a supermarket tabloid known for celebrity gossip and alien sightings.

"You know, his father was withLeeHarveyOswaldprior toOswald’s being — you know, shot. I mean, the whole thing is ridiculous. What is this, right prior to his being shot, and nobody brings it up,"Trumpsaid on "Fox & Friends."

Republicans in Indiana might give New York billionaireTrumpan almost unstoppable advantage in his turbulent journey toward the party's presidential nomination.

The real estate mogul holds a double-digit polling lead in the Midwestern state overCruz, a U.S. Senator of Texas.

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Cruzdenounced the Enquirer and its chief executive, David Pecker, who has endorsedTrump, for claiming his father, a Cuban immigrant to the United States, was pictured handing out pro-Fidel Castro literature withOswaldin New Orleans in 1963.

"Yes, my dad killed JFK, he is secretly Elvis and Jimmy Hoffa is buried in his back yard,"Cruzsaid in a sarcastic retort.

Cruzalso unleashedfuryoverTrump's earliercommentabout his wife, Heidi.

"Donald has a real problem with women. Donald is terrified by strong women - he lashes out at them,"Cruzsaid.

"The man is utterly amoral. Morality does not exist for him,"Cruzsaid.

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