Intensely

Most of all, American raceologists were intensely proud to have inspired the purely eugenic state the Nazis were constructing. In those early years of the Third Reich, Hitler and his race hygienists carefully crafted eugenic legislation modeled on laws already introduced across America, upheld by the Supreme Court and routinely enforced. Nazi doctors and even Hitler himself regularly communicated with American eugenicists from New York to California, ensuring that Germany would scrupulously follow the path blazed by the United States.  American eugenicists were eager to assist. As they followed the day-to-day progress of the Third Reich, American eugenicists clearly understood their continuing role. This was particularly true of California's eugenicists, who led the nation in sterilization and provided the most scientific support for Hitler's regime.
--Edwin Black, "War Against The Weak: Eugenics And America's Campaign To Create A Master Race", p. 277