The secret agreement John Kelly must make with Trump

White House Chief of Staff John F. Kelly needs to draw a red line. Not with North Korea but with President Trump. For the sake of Kelly’s own reputation but even more for the sake of the country, there can be no more presidential improv on the subject of North Korea or military threats in general.

This red line should be both invisible and impregnable. Only Kelly and the president should know it exists, but they should also have a clear understanding: If it is crossed, Kelly will leave. This is essential and, more important, achievable.

Drawing this line is essential because Trump’s bellicose impetuosity must be contained.

.. Mopping up, Defense Secretary Jim Mattis’s approach was to suggest that Trump should be taken seriously but not literally

.. This atonal cacophony is what happens without message control. But is it realistic to speak of controlling Trump?

.. Let Trump be Trump, when it comes to domestic policy and politics.

.. Just cordon off foreign policy, or the parts of foreign policy that could lead to military confrontation. Instruct the president that statements on those subjects must be debated and scripted.

.. Kelly’s power is at its apex. Trump cannot afford to lose another chief of staff. So the president needs Kelly more than Kelly needs this headache of a job.

And if the general wants to avoid being treated as just another menial fly-swatter, he will seize this moment to assert control, or leave having at least tried.

Parents should be repulsed by Trump’s playing of the father card

“The president weighed in just as any father would, based on the limited information that he had,” said White House press secretary Sarah Huckabee Sanders, effectively confirming The Post’s report that President Trump personally drafted Donald Trump Jr.’s misleading statement about his meeting with a Russian lawyer proffering dirt on Hillary Clinton.

.. “As any father would.” Fathers are supposed to teach their children the difference between right and wrong. My father taught me not to lie. Donald Trump Jr.’s father taught him to shade the truth — in this case, so much that it was in total eclipse. “The statement that Don Jr. issued is true. There’s no inaccuracy in the statement,” Sanders said. No technical inaccuracy, perhaps, but little actual truth.

“Primarily’’ was the tell, the classic Trumpian hedge behind which Sanders so unconvincingly hid.

.. Fathers are supposed to put their children’s well-being above their own; that selflessness is the essence of being a parent. Trump Jr.’s attorney, Alan Futerfas, told The Post that he and his client had been “fully prepared and absolutely prepared to make a fulsome statement” about the meeting. Then the president intervened, dictating edits in the statement to his aide Hope Hicks, and gambling foolishly that the real facts wouldn’t emerge.

.. When, inevitably, they did, it made Trump Jr. look bad — “If it’s what you say, I love it,” he told the Russian attorney of her Clinton offer — but also provided evidence of some willingness on the part of the Trump campaign to collude with the Russians. Whose interest was the president so frantically scrambling to protecting here, his son’s or his own?

The Donald Trump Jr. emails could hardly be more incriminating

By explicitly linking the source of the information to the Russian government and by describing it as “part of Russia and its government’s support for Mr. Trump,” Goldstone made crystal clear that he was offering the campaign a chance to collude — yes, that word is appropriate here — with a foreign government to “incriminate Hillary” Clinton and help win the presidency.

.. By reacting as he did, eagerly accepting the offer of this foreign aid, Trump Jr. made clear that he was a willing part of this incipient conspiracy — and yes, that word is appropriate here, too. “If it’s what you say I love it especially later in the summer,”

.. That Trump Jr.’s response now is to assert that he thought this was an offer of run-of-the-mill “political opposition research” that took place “before the current Russian fever was in vogue” is beyond telling, about his political and legal obtuseness.

..  We have had too much experience with this White House to simply accept that assertion at face value. For one thing, Trump Jr. was in constant contact with his father. For another, Goldstone specifically raised the possibility of sharing it with the candidate