If a candidate receives an appointment with a Presidential nomination, and the admission portal reads Appointee, is this a secure position or would a congressional nomination be better to have? Can the Presidential nomination be revoked and be used for another candidate?
The presidential nomination can NEVER be revoked. That's not possible. But I think I understand your question. "Can the academy take the appointment, which was given slated against a presidential nomination, away from one person and give that appointment based on the presidential to another person?
The answer is yes, but ONLY if the APPOINTEE, has more than 1 nomination. One of my candidates had this very thing happen. Now.... the good news is: It doesn't matter to the appointee. An appointee is an appointee and they can NOT take that away from you. In one of my candidate's case, he had a presidential nomination..... received an appointment using that nomination in October...... our senator gave him a nomination anyway, even though he already had the appointment..... the academy change his appointment to USE the senator's nomination and gave the appointment based on the presidential to another person of their choice.
The academy loves this. Appointments using a congressional nomination can only be used to give an appointment to someone in that state/district. With a a presidential, the academy can give the appointment to anyone in the country who has a presidential nomination.
Since then, our senators/representative have wised up. (As most have). If an individual receives an early appointment, because they had a presidential nomination, then the senator/representative IF SMART.... will NOT GIVE A NOMINATION to that individual. Most are smart enough not to even interview that applicant with an appointment. This way, even though the person with an appointment, using a presidential nomination, is from their state/district, that appointment doesn't count towards their slate of authorized cadets at the academy. The senator/representative still get an appointee.
This is exactly what happened to my son. In 2007, October, he already had his Presidential nomination and he received an early appointment at the end of October. We waited a couple days until the official package/notification came to him (November 7th), and then he contacted the senators and representative and let them know that he NO LONGER NEEDED a nomination from them. That he already received an appointment. This ensured our state would have another appointment. If my son had gotten a congressional nomination, the academy would no doubt use the congressional nomination spot instead of the presidential, so they could give the appointment from the presidential to someone they wanted to have an appointment who couldn't get one from their congressman/senator.
So in your case, it doesn't matter either way. You still have the appointment. It doesn't matter to you if they use the presidential or a congressional nomination. You're not going to lose the appointment. But why not let your state have that extra spot instead of the academy? Example: 2 state senators and your representative each have 1 spot open. That's 3 appointments. If you get an appointment with one of those 3, then there's 2 left. But if you get an appointment with the presidential, then the state still has all 3. Both senators and the representative.
So it's your call. But if you actually have an appointment IN HAND, and it's based on a presidential, then I would let my state have the extra spot instead of the academy. Of course the academy will tell you to STILL APPLY for the congressional nomination. THEY WANT to have the extra slot. If some at the academy had their way, they'd probably prefer that there were NO nominations, and that they, the academy, could control all 1200+ appointments. As it is, they only get direct control over half of the appointments. The other half MUST come from the state's senators/representative's lists.