Republican race gets heated

(NBC News) Republican presidential candidate Ted Cruz dropped a blistering verbal attack on GOP rival Donald Trump Tuesday.

Cruz called Trump "a pathological liar" and "amoral" while campaigning in Indiana ahead of tonight’s primary.

His outrage comes after Trump promoted a tabloid story which purports to link Cruz’s father to Lee Harvey Oswald, through photos, before Oswald assassinated President John F. Kennedy.

"This man is a pathological liar. He doesn’t know the difference between truth and lies. He lies practically every word that comes out of his mouth," Cruz said.

The National Enquirer says its reporters were rebuffed when they attempted to get reaction from cruz, and his campaign, to the story in April.

Trump, meanwhile, called Cruz a "a desperate candidate trying to save his failing campaign."

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