Might I suggest you key on his Constitutional beliefs and not be so worried about his Harvard Divinity training. I don’t think he’s trying out for pastor at your church.
His Harvard divinity training would have little to do with pastorate service and a lot to do with influence of liberalism in all aspects of life.
It would also depend on how long ago he got the training. Some of these liberal schools weren’t always that way in those departments. If he got it decades ago, I wouldn’t be too concerned with it.