Donald Trump has shared an unflattering photo of Sen. Ted Cruz's wife, the latest wrinkle in a feud between the two Republican presidential candidates.

The photo was part of a tweet that the GOP frontrunner shared on Wednesday night. The tweet read, "A picture is worth a thousand words," and it featured a photo of Cruz's wife, Heidi, next to a picture of Trump's wife, Melania.

A caption on the photo reads, "No need to 'spill the beans.' The images are worth a thousand words."

Cruz responded, saying: "Donald, real men don't attack women. Your wife is lovely, and Heidi is the love of my life."

The latest digital dustup between the two presidential candidates began Tuesday, stemming from an anti-Trump ad commissioned by a super PAC that is not affiliated with the Cruz campaign. The ad, which appeared on Facebook, shows Trump's wife, Melania, posing nude in a photo shoot for GQ Magazine.

Trump responded Tuesday by threatening to "spill the beans" on Cruz's wife. Cruz said in a tweet to Trump that the ad was "not from us."

Trump has frequently been accused of attacking women during his presidential campaign. Last week, Fox News rebuked him for relentlessly jabbing Megyn Kelly — calling it a "sick obsession ... beneath the dignity of a presidential candidate who wants to occupy the highest office in the land."

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