Whitman's 2017 book, Hitler's American Model: The United States and the Making of Nazi Race Law, received wide coverage in the news and academia.[6][7][8][9][10] Whitman demonstrates the extent to which US racial laws (Jim Crow laws, separate but equal legal doctrine) influenced the Nazi Regime in formulating the Nuremberg Laws of September 1935. The leading Nazi student of US racial laws was Heinrich Krieger, a jurist who studied at the University of Arkansas School of Law in 1933–34. There, he researched how laws across the US segregated and disenfranchised Native Americans, African Americans, and other disfavored groups like including Asians, Filipinos and Puerto Ricans. Krieger wrote the memorandum relied upon at the meeting June 1934 in which the Nazi racial laws, known as the Nuremberg Laws, were hashed out. Just as the Jim Crow Laws prohibited and criminalized intermarriage between Whites and Blacks, though as his book points out these types of laws existed in 30 states, many outside of the Jim Crow south. So the Nuremberg Laws prohibited marriages with Jews and threatened punishment. The Nazis departed little from their US model except insofar as that they found it too severe.[11] The so-called one-drop rule, classified as non-white anyone with even a single ″Negro″ ancestor. This was disturbing even to National Socialist policymaker, who shuddered at the ‘human hardness’ it entailed. According to the Nuremberg Race Laws, a ″full Jew″ was only someone who had three or four Jewish grandparents; there were also – in National Socialist terminology – ″half Jews″ and ″quarter Jews″, but they were not affected by the same discrimination.