Yes, send a letter of continuing interest (LOCI)
If you look at the Wait List FAQ post you will see that 22% of students on the WL were accepted last year.
Look up your admissions, counselor Contact | Undergraduate Admission | Case Western Reserve University for who to send a letter to.
Write an email (letter of continuing interest aka LOCI)
Honestly, I would use a chat. GPT kind of thing to get a good template for an email like this. But what I would do is include specific examples of why CWRU is your top choice.  I would look at the “ About” section on the CWRU website and use some of that to talk … for example there’s a phrase that says that the mission vision and values” propel us, every day, to think big and think beyond the possible”
So maybe you talk about something that you’re thinking big about .
Also, it talks about building relationships across greater Cleveland and is there anything there that you could show interest in?
Case is also big on experiential learning so do you have any thoughts on co-ops or study abroad or anything like that that you’re interested in?
 also search “traditions” on the cwru website and see if there’s any that particularly speak to you that you might show that you want to be interested in participating in?
And of course, most importantly, if it’s true, then tell them if accepted, you would attend Case