The husband of White House counselor Kellyanne Conway on Monday blasted legal arguments promulgated by President Trump that assert Robert Mueller’s appointment as the special counsel in charge of the federal Russia investigation was unconstitutional.

“There is absolutely nothing wrong with lawyers making inventive and novel arguments on behalf of their clients, or on behalf of causes or people they support, if the arguments are well-grounded in law and fact, even if the arguments ultimately turn out to be wrong,” George Conway wrote in a lengthy blog post for Lawfare.