Hillary Clinton appeared on "Saturday Night Live" during the opening of the show and was joined a few moments later by Amy Poehler, who wore the same outfit as Clinton and has a very good impersonation of Clinton's seemingly fake laugh and facial expressions when put under stress. Clinton did seem relaxed as amy impersonated her and said that for that evening it would be about enjoying the show and would not be thinking about politics.
This explains why Hillary wasn't on a campaign flight to Ohio, Illinois, and you can't really blame her. With Barack Obama's momentum winning nearly a dozen primaries and caucuses, he is almost definitely going to win in illinois as this is the state that he served in the Senate from 1997 to 2004. He was elected to the U.S. senate in 2004 with an impressive 70% of the vote.
It may seem that Obama has been demolishing Clinton's dream of becoming President of the United States, but hey, how many people have had the chance to say "Live From New York, It's Saturday Night!" Hillary Clinton is human being first, and a politician second, and when any person suffer's so many downfall's, it is definitely wise to take a break.
Campaigning must be a constant stress and require a lot of mental and physical energy, which if you think about it...Albert Einstein (or was it Benjamin Franklin?) said insanity is doing the same thing over and over and expecting different results...