White House counselor Kellyanne ConwayKellyanne Elizabeth ConwayIran: Rouhani, Trump won't meet at United Nations Trump denies reports he's willing to meet with Iran with 'no conditions' O'Rourke's debate moment reignites gun debate on Sunday shows MORE's husband on Monday released an article defending the constitutionality of special counsel Robert MuellerRobert (Bob) Swan MuellerFox's Cavuto roasts Trump over criticism of network Mueller report fades from political conversation Trump calls for probe of Obama book deal MORE's probe into alleged ties between the Trump campaign and Russia's election meddling. 

The piece, titled "The Terrible Arguments Against the Constitutionality of the Mueller Investigation," takes aim at President TrumpDonald John TrumpTed Cruz knocks New York Times for 'stunning' correction on Kavanaugh report US service member killed in Afghanistan Pro-Trump website edited British reality star's picture to show him wearing Trump hat MORE's recent Twitter attacks on the probe, in which the president argues the investigation is unconstitutional. 

Conway points out the initial spelling errors in the tweet and said he most likely got his argument from conservative legal scholar Steven Calabresi.

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"Unfortunately for the president, these writings are no more correct than the spelling in his original tweet. And in light of the president’s apparent embrace of Calabresi’s conclusions, it is well worth taking a close look at Calabresi’s argument in support of those conclusions," he writes. 

Calabresi has argued that Mueller's probe is "null and void" because it violates the Appointments Clause of the Constitution, Article II, Section 2, Clause 2.

"The 'constitutional' arguments made against the special counsel do not meet that standard and had little more rigor than the tweet that promoted them. Such a lack of rigor, sadly, has been a disturbing trend in much of the politically charged public discourse about the law lately, and one that lawyers — regardless of their politics — owe a duty to abjure," Conway said. 

This is not the first time Conway has criticized his wife's boss.  

Conway previously shared commentary by a Politico reporter critiquing Trump’s claim on the constitutionality of the probe:  

He added his own commentary, writing: “And if this were true, you’d think this conservative Republican-controlled Department of Justice would revoke or decline to utilize the Special Counsel regulations. But it hasn’t.”