I was contacted a few weeks after the deadline for the Summer internship. My phone interview was rather long as far as phone interviews go and asked the basic questions that you hear during an interview. MEI seems to value strong writers over anything else so I would mention that as a skill before you bring that up. Also, having a clear idea of MEI's principles and purposes will do you well.

Very quick, very nice and straightforward. Only one interview, on Zoom at the time. Open to hearing how the internship would contribute to my career and degree, and even allowed me to stay a second term.