Who is another candidate, even on the Republican screen? And just to let you know, you are off by a decade in your twenty something prediction, at least in rearguards to me. I have no clue who will win the next Presidential election. In fact, no one does. However I can get behind someone who will be in my mind, the one to lead America back to her roots. Where she needs to be IMHO.
I cannot claim all your years of experience in politics. However I took serious notice when Obama took office. I knew, without a doubt he would be horrible. Obama has done nothing to show me to be wrong. Will Obama take office again? I sure hope not and I tell everyone my stance and my reason for it. I will debate anyone who 'likes' Obama and their reasons.
I will get behind a candidate when they are consistent and what I would chose if our positions were switched. Ron Paul may be 'old' but I would wager he could run circles around Obama and still have enough gas in the tank to do an honest days work. I know he doesn't smoke either! How many other people in the nomination spectrum can even stand up to the knowledge of Ron Paul? The consistent honesty? The objective truth? I see not even one.