The Obama campaign — or, better yet, Obama personally — ought to pick up the tab (a total of a few thousand bucks), out of loyalty to the victims and as a means of publicizing the outrage.
Of course, if John McCain had any class, he’d write the check himself. (It would even be a clever campaign tactic, so he’d also do it if he merely had brains and imagination.) But if my grandma had wheels, she’d be a trolley-car. So Obama has to do it, or leave the innocent victims stuck.