I don't think it is. The warrant was issued. That shows facts in the affidavit sufficient to cause the judge to believe there is probable cause they will find evidence of a crime. I said, with I think goats agreement, that the location of the emails, and the sender, isn't enough to issue the warrant. Thus there are more facts.
Begging the question would be like this:
Q. Upon what basis did a judge issue this warrant
A. Based upon facts sufficient to show there is probable cause to find evidence of a crime.
The answer is simply an alternative way to phrase the question.