Former National Intelligence Director James Clapper said he was worried the killing of ISIS leader Abu Bakr al-Baghdadi might “galvanize” the remaining parts of ISIS.

“What is going to be interesting is to the extent to which this negatively affects ISIS or does it galvanize ISIS, the remnants of ISIS, which still survives as an ideology and has franchises in other places besides Syria,” Clapper said Sunday on CNN’s State of the Union.