The scale and scope of the recently revealed computer hack of scores of federal government agencies, U.S. corporations and perhaps other targets appears to be unprecedented. The U.S. response must be commensurate. First, an intensive investigation must determine how many entities were compromised and how much damage has been done. How did the cyberattack go undetected for nearly nine months? What can be done quickly to staunch the digital bleeding? And how can the U.S. effectively respond without triggering a self-defeating escalation? Under normal times, under a normal president, this nation would lead a domestically bipartisan and internationally allied response to such a breach. But President Donald Trump is not that president.