From Wikipedia's page on Office of Personnel Management data breach :
In June 2015, the United States Office of Personnel Management (OPM) announced that it had been the target of a data breach targeting the records of as many as four million people. The final estimate of the number of stolen records is approximately 21.5 million. This includes records of people who had undergone background checks, but who were not necessarily current or former government employees. It has been described by federal officials as among the largest breaches of government data in the history of the United States. Information targeted in the breach included personally identifiable information such as Social Security numbers, as well as names, dates and places of birth, and addresses. [...]
In the aftermath of the event, Katherine Archuleta, the director of OPM, and the CIO, Donna Seymour, resigned.
On August 27, 2017, the FBI arrested a Chinese national suspected of helping to create the malware used in the breach. [...]
President-elect Donald Trump said: "China, relatively recently, hacked 20 million government names. How come nobody even talks about that?"
Did Obama or his spokeperson(s) say anything about the OPM breach?