This is an opinion by piece by judge Andrew Napolitano. Who is frequently on FOX News. AN has lately been arguing that Trump has violated his oath of office:
This is Amash’s argument: The special counsel found evidence of obstruction of justice by the president, and historically presidential obstruction of justice is an impeachable offense. This is a legal narrative, not a political one. But it has heretofore not been articulated publicly by any Republican officeholder, until Amash courageously did so last weekend.
The Nixonian argument that the president can do no wrong was soundly rejected by the lessons of Watergate and Nixon’s reluctant resignation, but it has reared its head again. No serious legal thinker — not even an attorney general bent on protecting the president — can make it with intellectual honesty or a straight face.