Although the title is somewhat misleading, this is an excellent article. President Trump did not directly authorized surveillance of his own administration. He issued an executive order via Don McGahn that allowed Dana Boente, as United States Attorney for the Eastern District of Virginia, to authorized the April 2017 FISA warrant which has since been declared illegal.
At the time, both Boente and Comey knew what they were authorizing was illegal.
In late 2018, when McGahn discovered what he had inadvertently allowed, he resigned.