Former Secretary of State Hillary Clinton warned Thursday that the Trump administration isn’t doing enough to monitor and thwart terrorists who still pose a threat to the U.S., 25 years after the 9/11 attacks. “I worry a lot that we’ve let down our guard on counterterrorism, and I don’t say this to scare anybody or to exaggerate, but I think we are not paying enough attention to resurgent terrorist actions,” Clinton said in an interview with NBC…