@sss0296 As you’ll see from the thread that @weiba1014 mentioned, some applicants, including myself, have received “possible admission” emails which prompt for a letter of interest. If you get this email, send the letter. If you haven’t, then I don’t know how much it can help at this point but it’s worth a shot if you’re really interested. Many other schools gladly take letters of continued interest and usually don’t look at them as bothersome. If anything, expressing genuine interest and continuing to chase down that acceptance can either help you or not hurt you at all.