Dealer is 2X to have a doubleton than a Singleton for his last card! I would save the JD.
But the 9S was the card to lead not the 9D! I am sure you can figure that one out!
Also, S1 breaks up his Spade doubleton on the 2nd trick??? And he/she plays a useless 9H, when he is suppose to slough the suit he is not saving ASAP.
Score 8 to 5, I would have donated. At that score, so what if you give them one point, now 8 to 7 and your deal. Should score 1 and now 9 to 7 and you can donate again as you have the next deal. It is all about score and situations. Why donate on this hand: YOU HAVE NOTHING TO RUN TO if dealer turns it down. Now they get two bites of the apple. So many errant plays.
Euchre may be a simple game, but has a lot of situational complexities.
IRISHWOLF