The Trump administration pushed for an unusually aggressive search of Rep. Ilhan Omar’s house in recent days in an immigration fraud probe that targets the congresswoman, possible false statements made on government documents, and a potential conspiracy, according to multiple people familiar with the investigation.

Prosecutors, however, first had to contend with a federal magistrate judge, in a prolonged back-and-forth that hasn’t previously been reported. Judge Matthew Sharbaugh of the DC District Court ultimately limited how the Justice Department could access Omar’s documents in Monday’s search, before he would approve the warrant, because of her role as a member of Congress and the Constitutional protections that affords, multiple people familiar with the investigation told CNN.

The investigators’ inquiries that prompted the search include whether Omar or her now-deceased father lied about her age when she obtained citizenship in 2000, claiming she was a minor when she was of adult age.