You are restating my original comment. Unless you think the normal security clearance system is “just ask the President what he thinks”.
Actually, speaking of that one guy, there are very, very few convicted felons with documented mishandling of classified information who get a security clearance under normal circumstances.
You're confused. The president of the United States is not just "some guy". He is elected by the citizens of the United States to head the executive branch. Besides, you're assuming two more things:
1. That there has been no vetting (100% false - FBI vetting began in early December)
2. That they have or need access to any information requiring clearance