It's rare that I agree with anything trump has said. But this statement of his from July 2018 is something I can agree with:

"As the head of the executive branch and Commander in Chief, I have a unique, Constitutional responsibility to protect the Nation’s classified information, including by controlling access to it…. More broadly, the issue of [a former executive branch official’s] security clearance raises larger questions about the practice of former officials maintaining access to our Nation’s most sensitive secrets long after their time in Government has ended. Such access is particularly inappropriate when former officials have transitioned into highly partisan positions and seek to use real or perceived access to sensitive information to validate their political attacks. Any access granted to our Nation’s secrets should in furtherance of national, not personal, interests."