You’re thinking of Fiduciary Duty

For example, certain kinds of financial advisers have a fiduciary duty - that is, a duty to act in the best interests of their clients. But the ones with whom mere mortals interact are (quite predatory) salesmen.

In the same vein, I expect politicians do act in good faith towards their larger donors, but don’t see themselves as owing anything to their constituents.

Without prejudice for or against the research in question (most may be worthy, but some could be spurious), this is 100% in keeping with his promises to the American people.

Everyone is shocked you’re get exactly what it says on the tin.