Politics
Branden Camp/Getty Images
Republican presidential candidate Donald Trump speaks during a campaign rally at the Georgia World Congress Center, Sunday, February 21, 2016 in Atlanta, Georgia.
In a tweet Tuesday evening, Trump criticized Cruz over a television advertisement that an unaffiliated, anti-Trump super PAC ran in the lead-up to Utah's caucuses Tuesday.
The ad showed Trump's wife, Melania Trump, posing nude in a GQ magazine photoshoot.
"Lyin' Ted Cruz just used a picture of Melania from a G.Q. shoot in his ad. Be careful, Lyin' Ted, or I will spill the beans on your wife!" Trump tweeted.
The Trump and Cruz campaigns did not immediately respond to a request for further comment. The two GOP rivals are squaring off in contests in Utah and Arizona on Tuesday night.