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Republican U.S. presidential candidate Sen. Ted Cruz, with his wife Heidi at his side, reacts to the primary election results in Florida, Ohio and Illinois during a campaign rally in Houston, Texas March 15, 2016. Reuters

Donald Trump is threatening to "spill the beans" on Heidi Cruz, a Goldman Sachs executive who took a leave of absence from her high-power job to quietly stand by her husband's side throughout the campaign trail with a beaming smile and quick round of applause whenever needed. The wife of Texas Sen. Ted Cruz said Wednesday she has no idea what Trump is talking about.

What we do know is that Heidi Cruz is a financial elite who spent decades building up the income of some of the nation's wealthiest investors. As a managing director at Goldman, she oversaw its Houston wealth management unit, which included portfolios for clients with an average net worth of $40 million. Heidi Cruz is also her husband’s chief fundraiser and has met with faith and conservatives leaders in recent months to shore up support for his struggling campaign to take down Trump.

Heidi Cruz shrugged off questions Wednesday about a tweet from Trump Tuesday night to her husband threatening to “spill the beans” about her. “You know, as I said, you probably know by now that most of the things that Donald Trump says have no basis in reality,” she told reporters in Wisconsin, Politico reported. "So we are not worried in the least. We are focused on our campaign, and we are going to continue to do that."

Trump's latest feud with Ted Cruz marks another weird turning point in the 2016 race, which has seen Trump belittle his rivals height, energy and job-creation records. He tweeted Tuesday: “Wow @SenTedCruz, that is some low level ad you did using a picture of Melania in a G.Q. shoot.Be careful or I will spill the beans on your wife,” before deleting and re-posting, “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!”

Ted Cruz fired back with his own tweet: “Pic of your wife not from us. Donald, if you try to attack Heidi, you’re more of a coward than I thought. #classless”

The spat continued Wednesday, with Trump tweeting: “Lyin' Ted Cruz denied that he had anything to do with the G.Q. model photo post of Melania. That's why we call him Lyin' Ted!”

Trump's tweet seemed to refer to an anti-Trump super PAC ad focused on Trump's then-girlfriend Melania posing nude for British GQ in 2000. The ad was aimed at reaching conservative voters ahead of Utah's GOP caucus Tuesday night and was deemed "a cynical, short-sighted move" by Slate. Ted Cruz ended winning Utah, but he is still behind Trump in the all-important delegate count to win the GOP presidential nomination.

Heidi Cruz spent her childhood in San Luis Obispo, California. Her parents are Seventh-day Adventists. She moved to New York after graduating from Claremont McKenna College in California and worked on emerging markets at J.P. Morgan. She later attended Harvard Business School in Massachusetts and worked on George W. Bush’s 2000 presidential campaign, where she met the man who would become her husband. Ted Cruz went on to win a Senate seat in Texas in 2012.

“If you can marry somebody that is complementary to your business, it’s great networking,” she once said about her marriage.

Heidi Cruz has said she is a big cheerleader for husband, as well. “I wouldn’t have given up my job and the time with my girls if I did not really believe in my heart that Ted Cruz would win this election," she told the Washington Post.