 Complete the following phrase:  In June 2019, in violation of Department of Justice policy, Barr pressured Berman, then the U.S. Attorney for the Southern District of New York, to drop an investigation into close allies of Turkish President Recep Tayyip Erdogan involved with the Turkish bank Halkbank. The bank and the individuals in question were alleged to have broken U.S. sanctions on Iran, funnelling billions of dollars to Iran and helping fund its nuclear ambitions. Barrs demand followed a concerted pressure campaign by Erdogan and his close associates, including his son-in-law, Turkish Fice Minister Berat Albayrak, and Mehmet Ali Yalcindag, a Trump family friend involved in developing the Trump towers in Turkey; Erdogan himself personally insisted to President Trump that the Halkbank investigation be shut down on at least two occasions, November 1, 2018, at the 