One of the heroic survivors of the 2012 Benghazi attack, who held off invading Islamists until rescuers reached the besieged CIA base, has begun a national campaign to counter President Obama’s narrative on the terrorist threat. Former Army Ranger Kris “Tanto” Paronto has started a nonprofit called Leading From the Front, which he hopes will translate into a national movement to drive home the real threat Islamic extremists pose to America. “Radical Islam is at war with America, and we are slowly losing,” Mr. Paronto said. “From Benghazi to Orlando, we are seeing the deadly consequences of President Obama and...