A criminal conviction is a long-standing disqualifier for holding a security clearance – a license to access national security secrets, including documents marked Top Secret. Just being charged criminally can mean denial or loss of clearance too. The dilemma arises as Trump is the president elect but also a convicted felon.
https://rawstory.com/trump-security-clearance/
@JV3MJD that will not matter because being elected indicates the American people trust the person and no clearance is needed. It also works for senators and House members