President Obama said Thursday that the U.S.-led fight against the Islamic State is making progress in spite of high-profile terrorist attacks around the world, while Republican nominee Donald Trump charged that Mr. Obama has allowed the Islamist extremist group to rampage “out of control.” “We’re going to keep going after ISIL aggressively,” Mr. Obama said at the Pentagon, using an acronym for the group. “We continue to take out senior ISIL leaders and commanders.” The president said the Islamic State hasn’t had a major success in Iraq and Syria in a year. But Mr. Obama acknowledged that “lone wolf” attacks...