I bought what appears to be an original study of his painting of President Eisenhower. I know the finished painting is in a museum. But how do I find out if the study painting is an original?

I would call the museum and make a appointment to show the painting to a consultant

Jill take it to a pro. First off , contact the N R museum staff.

Sounds like a copy to me. We were at the Museum last month. There are several of Eisenhower there. Send the museum in Stockbridge Maine a photocopy and ask them that question

If they have a curator at the museum that is willing to look at the painting you could ship it through USPS priority and put insurance on it extra insurance

Yes. I think that Louis's suggestion sounds right

I live in Michigan. I wonder if I could ship it to them?