Charles Rex Arbogast/AP Photo

Democratic presidential hopeful Sen. Barack Obama, D-Ill., receives a hug from Sen. Ted Kennedy, left, as Caroline Kennedy, daughter of former President John F. Kennedy, applauds during a rally at the Meadowlands arena in East Rutherford, N.J., Monday.

Democratic presidential hopeful Sen. Hillary Rodham Clinton, D-N.Y., coughs as she conducts a roundtable discussion at the Yale Child Study Center in New Haven, Conn., Monday. Generally a stalwart campaigner, Clinton showed signs of strain during the roundtable at one point coughing uncontrollably. "It comes and goes," she said, wiping her eye and sipping water to get her cough under control.

Question: Will the race between Obama and Clinton tear up the Democratic Party?

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