Obviously they were vetted so that they are only selecting Trump syncophants.
Look at this scenario, what if one said: "As a federal judge, the 22nd amendment is clear and I would rule that no person can have a 3rd term until our constitution has changed."
Not only would that be the correct answer, it would secure the democrat votes. What is a republican supposed to do, vote against a judicial nominee for supporting the constitution? What is Trump supposed to do, withdraw the nomination for supporting the constitution?
If that person was a true conservative republican, that is the answer. You can stay true to your beliefs, and almost assure your nomination.
But, not a single one of these people are true conservative republicans. They proved they are Trump syncophants. They will risk their nomination to stay loyal to the person, not the republic.