Fairly flexible:

• from either of Trump's terms

• Senate-confirmed cabinet member

• acting cabinet member

• in a US court

• in the ICC

• in a foreign court of competent authority

But must be:

• someone identifiable as a "cabinet" member; VP, presidential-appointed close advisor, department head, etc.

• an enforceable conviction; not symbolic

Bonus points if it actually cites international law or treaties such as the Geneva Conventions, but a clear corollary national law would suffice.