War on terror

Corker says intelligence predicts decades-long battle with ISIS

The reports delivered to U.S. Sen. Bob Corker and other lawmakers last week were blunt in their assessment of the fight against ISIS and terrorism.

The ideology of ISIS echoes Nazism in its genocidal ambitions and tone, one counterterrorism expert warned. Last month's bombings in Brussels leave no doubt that the threat ISIS poses to the West is far greater than anticipated, concluded another.

The potential for an ISIS-directed attack in the United States is real and could be similar to the massacres that killed dozens in Brussels and Paris, predicted yet another.

Corker, the Tennessee Republican who chairs the Senate Foreign Relations Committee, said the warnings underscore what U.S. officials have long known would be a prolonged battle against ISIS and terrorism.