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This doesn’t bode well for President Donald Trump’s supposed efforts to get Kim Jong Un to denuclearize the Korean Peninsula.

Trump couldn’t even convince his daughter-in-law Vanessa Trump to stay married to his son Donald Trump Jr., according to a report in the New York Daily News.

Apparently, the twice-divorced president — who boasts of his deal-making prowess but who has a debatable track record of maintaining happy, monogamous relationships — didn’t have much success in stopping his daughter-in-law from filing for divorce last week.

“The President tried to intervene with Vanessa,” a source with close ties to the Trump family told the Daily News. “He’s personally upset … Donald Trump failed as (a) marriage counselor.”

The insider said that the president suggested that the couple stick it out a little longer and see if they could save their 12-year marriage, which has produced five children, ages 3 to 10.

Trump’s interventions reportedly took place during or in the months since his son’s 40th birthday party over the New Year’s holiday at Mar-a-Lago in Palm Beach.

Then again, perhaps Trump couldn’t get his son to stop being so “cheap,” as has been reported by Page Six.

The site, which first reported on the rumors that the couple were splitting up, cited multiple sources as saying that Vanessa Trump was fed up with the way her husband treated her “like a second-class citizen” and kept her on “such a tight budget,” she had to turn to her mother for money.

One friend told Page Six: “She doesn’t live a lavish life and can very rarely pick up a check at dinner.”

Page Six added that the marital problems between the couple go back before they were married, with friends advising her to not go through with the wedding. Vanessa Trump also had been talking to divorce attorneys before her father-in-law’s election.

“No one thought he’d win,” a source told Page Six. “He won and she decided to stay until his term is over. But she just couldn’t stand it anymore.”

The Daily News added that the White House sees the divorce as “more bad news,” and not just for the president on a personal level.

Vanessa Trump, 40, filed for divorce in Manhattan Supreme Court last Thursday — the same day that the New York Times reported that special counsel Robert Mueller subpoenaed the Trump Organization to turn over documents, including some related to its investments in Russia.

Trump Jr. and younger brother Eric, 34, were put in charge of the Trump businesses during their father’s time at the White House.

Multiple reports say that Mueller’s investigators are keenly focused on a June 2016 meeting at Trump Tower that Trump Jr. arranged. According to reports, Trump Jr., Paul Manafort and Jared Kushner met with a Kremlin-connected Russian lawyer and four others with Russian ties, in the hopes of getting incriminating information on Hillary Clinton.

On Friday, legal experts raised some proverbial eyebrows over news that Vanessa Trump had hired a criminal defense attorney, not an expert in family law, to represent her in her divorce.

Early reports suggested the divorce would be amicable. Vanessa Trump filed for an “uncontested” hearing and the couple issued a joint statement, saying they “will always have tremendous respect for each other and our families.”

But Manhattan family law expert Bonnie Rabin had this to say to Page Six about Vanessa Trump’s choice of legal representation: “It’s a curious choice if it’s an amicable separation.”

The hiring of a criminal defense attorney suggests that Vanessa Trump expects that the divorce could become “messy,” New York magazine added.

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But a spokesperson for Vanessa Trump insisted to Page Six that the attorney, David Feureisen, is someone she and her family have known for more than 20 years. The spokesperson added that the attorney “practices in many areas of the law and … is not a criminal defense attorney.”

Page Six disputed the idea that Feureisen is “not a criminal defense attorney,” given that he’s best known for successfully representing the appeal of a mob-connected New York man who was convicted of murder.

The Daily News added that some are pondering the possibility that an estranged Vanessa Trump would be willing to tell Mueller’s investigators what she knows about her soon-to-be ex-husband’s Trump Tower meeting.

But others on Twitter have hatched the conspiracy theory that the divorce is just a ploy by Trump Jr. or others in his family to hide assets in the face of Mueller’s inquiries.

Whatever is going on with his marital demise, Trump Jr. decided to get out of the Big Apple over the weekend and enjoy some rest and relaxation with his kids at Mar-a-Lago. By various accounts, Trump Jr. is a devoted father to his five children, though Page Six also said that his travel for work and for hunting trips kept him away from his family for extended periods of time.

In any case, Trump Jr. both showed his devotion, while also appearing to launch a PR offensive to offset negative attention to his marital news. To delight his fans and to deflect criticism, he posted cute photos of his kids enjoying their weekend with him.

On Friday night, he posted to Instagram a photo of him with his 3-year-old daughter Chloe. Tellingly he wrote, “No matter what is going on bedtime cuddling with the smurf puts a Yuge smile on my face.”

On Saturday, he enjoyed a “date night” with his oldest daughter Kai, while going fishing with his son Donald III, 9, earlier that day. He captioned his photo with Donald III: “Out with the little man and some friends. #weekend #boys #trip #fiahing #sharks #catchandrelease #outdoors.”

Yet another photo appears to show his three youngest children, Chloe, Spencer, 5, and Tristan, 6, at the Trump International Golf Club in Palm Beach, marveling over a fish Spencer caught.

This story has been updated.