First, as Obama officials well know, under the FISA process, it is technically the FISA court that “orders” surveillance. And by statute, it is the Justice Department, not the White House, that represents the government in proceedings before the FISA court. So, the issue is not whether Obama or some member of his White House staff “ordered” surveillance of Trump and his associates. The issues are (a) whether the Obama Justice Department sought such surveillance authorization from the FISA court, and (b) whether, if the Justice Department did that, the White House was aware of or complicit in the decision to do so. Personally, given the explosive and controversial nature of the surveillance request we are talking about – an application to wiretap the presidential candidate of the opposition party, and some of his associates, during the heat of the presidential campaign, based on the allegation that the candidate and his associates were acting as Russian agents – it seems to me that there is less than zero chance that could have happened without consultation between the Justice Department and the White House....
Nevertheless, whether done inside or outside the FISA process, it would be a scandal of Watergate dimension if a presidential administration sought to conduct, or did conduct, national-security surveillance against the presidential candidate of the opposition party. Unless there was some powerful evidence that the candidate was actually acting as an agent of a foreign power, such activity would amount to a pretextual use of national-security power for political purposes. That is the kind of abuse that led to Richard Nixon’s resignation in lieu of impeachment.