The F.B.I. has said that more Americans have died in domestic terrorist attacks than international ones since Sept. 11, and that domestic terrorism is increasingly motivated by white supremacist ideology. Christopher Wray, the director of the F.B.I., told Congress last month that the bureau had made about 100 domestic terrorism arrests in the first three quarters of the year, roughly the same number of international arrests over that time period. No United States government agency is responsible for designating domestic terrorism organizations, and there is no criminal charge of domestic terrorism. Individuals who are considered domestic terrorists are charged under other existing laws, such as hate crime, gun and conspiracy statutes.