The U.S. has seen a rise in violence by white supremacists, including the murders of 11 people at a Pittsburgh Synagogue last fall.
Security was stepped up across the country even though U.S. law enforcement officials are not aware of any imminent threat.
What investigators have seen is a steady rise in right-wing extremism.
ISIS inspired its followers online and now white supremacists are doing the same.
And we ought to acknowledge that there is a rise in sort of nationalism around the world," said Fran Townsend, a former White House Homeland Security advisor.
At the White House, President Trump said he did not see white nationalism as a rising global threat.
Currently, the FBI has about 900 active domestic terrorism cases and that includes cases tied to white supremacists. »