The five most popular stories on CNN.com in the last 24 hours, according to NewsPulse:
Judge: Health care mandate unconstitutional: A Virginia federal judge on Monday found a key part of President Barack Obama's sweeping health care reform law unconstitutional, setting the stage for a protracted legal struggle likely to wind up in the Supreme Court.
Zelizer: Why 'W' must be smiling: Julian E. Zelizer, professor of history and public affairs at Princeton University, writes that former President George W. Bush must be smiling because midway through President Obama's administration, many of Bush's polices are still in place.
Snowstorm heads east after delaying travel: The main thrust of a raging storm that dumped snow in parts of the Midwest over the weekend moved north of the border Monday, but the United States was still expected to feel some of its effects in the form of rain, snow or frigid temperatures.
Baby survives deadly crash after police chase: A 3-month-old girl was found hanging upside down in her car seat after being involved in a police chase that left the driver of the car dead, Texas police said Monday.
Hopes fade for 17 Antarctica sailors: The search has been suspended for 17 crewmen missing at sea after the sinking of a Korean fishing vessel in the frigid ocean waters around Antarctica, a New Zealand rescue agency said Tuesday.