Of course you can. There's functionally no such thing as clearance for the president. They have access to everything as they are the source of all clearances.
The fact is that she should not have her clearance now, or anyone else involved in the emails. I know a little about it, I have a Secret in DOD world and a Q in DOE world, as well as a HRP. Q is the equivalent to Top Secret there is nothing higher. It is a long process to get one and there is a reinvestigation every 5 years to keep it for us. People have had their clearance and then 5 years later have it revoked for something that happened after they got it. I actively work for both DOD and DOE, and have a little knowledge about it. I'm traveling for a month for DOE work coming up soon. Even my wife doesn't really know what I do, that has gotten people fired before. I work in an extremely high security place. No pov's allowed in some areas, and not even the govvies can have a USB connection in the vehicle, no back up camera and no GPS, they are all disabled if they come with them. No cell phones allowed (we have to leave in our pov), no cameras or anything like it. I can't even wear my GPS watch because I can 'plot a course'. I am not just spewing ignorance. I can tell you without a doubt that if anyone I work with did anything like this, our clearance would be revoked. We would also be fired. Thats not just my opinion it is fact. It has happened. Emails are marked, everyone is given a brief of how to treat emails or other sensitive material. The easiest way to lose your clearance is truthfulness. Lying, misleading, doing something wrong then not admitting it will 100% lose your clearance. You can make honest mistakes, if you are truthful about it often times you will keep your job, be put in probation. But if you lie? Gone, every time. Not being able to keep a clearance seems like a clear case of not being fit to be President, among other things the FBI director stated. She has lied several times and not even about this. That alone should have revoked her clearance.
The fact that she still has her clearance is proof there is a double standard, among other examples. Rules don't apply for all, even when they should. She has lied several times not counting the email fiasco.