Answer:
I think Robert Kennedy felt upset, disappointed, and worried. The reason is that he mentioned feeling upset. Also, that he couldn't reach an agreement and finish the problem, third he was in charge to change everything and he failed.
Step-by-step explanation:
The reasons for this answer are that in the first place Robert Kennedy did mention he felt upset because he and his counterpart couldn't reach an agreement. Also, the reporter said he saw him very upset. And for good reasons, he should have been upset. He had everything to change the destiny of the problem but he didn't manage to achieve success. So, he took it personally and felt he failed.