The threat of white nationalist violence in the U.S. is at least as big a threat as that posed by the Islamic State (ISIS) and similar groups, the FBI revealed. Director Chris Wray told the Senate Homeland Security and Government Affairs Committee that there are currently 1,000 open investigations into domestic terrorist groups and another 1,000 probes into groups with radical Islamist ideology. The number of attacks carried out by white supremacists were almost triple" those of those carried out by people who identified with groups such as ISIS, said Democratic Senator Claire McCaskill. And government data obtained by The Hill suggests the number of white supremacist attacks compared to those from radical Islamist groups was as many as two to one. "We have had zero hearings on the threat of domestic terrorists and the threat they pose and our response to it," McCaskill said, explaining there had been a number of hearings about ISIS, but none about white supremacists. Wray ... explained domestic and international terrorism was investigated differently. "A lot of the [domestic terrorism] cases we bring, we're able to charge under gun charges, explosive charges, all manner of other crimes," Wray explained. His comments on the open investigations at the department come as the Department of Justice announced there were "systemic" problems within the FBI that included failure to properly tackle allegations of serious misconduct, and FBI employees failing polygraph tests.