Washington (CNN) President Donald Trump has been pushing to reinstate broader family separation policies and sought to close the US-Mexico border at El Paso, Texas, as his conflict with Homeland Security Secretary Kirstjen Nielsen reached a boiling point.

Three Thursdays ago, in a meeting at the Oval Office with top officials -- including Nielsen, Secretary of State Mike Pompeo, top aides Jared Kushner, Mercedes Schlapp and Dan Scavino, White House counsel Pat Cipollone and more -- the President, according to one attendee, was "ranting and raving, saying border security was his issue."

Senior administration officials say that Trump then ordered Nielsen and Pompeo to shut down the port of El Paso the next day, Friday, March 22, at noon. The plan was that in subsequent days the Trump administration would shut down other ports.

Nielsen told Trump that would be a bad and even dangerous idea, and that the governor of Texas, Republican Greg Abbott, has been very supportive of the President.

She proposed an alternative plan that would slow down entries at legal ports. She argued that if you close all the ports of entry all you would be doing is ending legal trade and travel, but migrants will just go between ports.

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