Martha: Clark, I'm only asking for two hours. I'm sorry to cut into your busy social schedule.

Clark: It's not that. I don't mind helping out for a good cause. It's just all these people are--

Martha: Old and sick?

Clark: It's just hard to deal with. (Deal with the situation or the people?)
There's nothing we can really do to help them.
Sounds like he means it's heartbreaking to try to help the people.
Thanks, Vorpar!