I'd agree that there is no sport that makes a perfect analogy for my point; but, then there is no sport that makes a perfect analogy for your point... although, perhaps a sport other than a ball game might might be better.
Although imperfect, consider a baseball game. For argument sake, say the Trump Bombers are winning 8 to 5 against the Cruz Constitutionalists (or 800 to 500, converting runs to delegates). At the bottom of the ninth, the team with the most runs is the winner; of course, the analogy is most imperfect here, as there is no winner unless one of the teams has 13 runs. There is nothing wrong with Team Cruz rallying in the 9th to tie, and winning it in the 10th or 11'th inning.
Oh, and btw, I see team Trump and team Cruz in the same league. In the National Series, I'm still rooting for the American League against the 'Rat League, regardless of whether its the Trump Bombers or Cruz Constitutionalists representing the American League.
See, that makes a big difference. What Cruz is doing is guaranteeing that if he did win this game, he loses the next one. And he is hurting the team that is currently winning, and is likely to win (making them waste their closer in relief) such that they are more likely to lose the championship.
Not good.
If this were baseball, when one side is 8 runs ahead after 8 innings, the other side would concede so that the winner could rest up for the next game, at which the loser would even help out.