The story

The news that Sen. Edward Kennedy had been diagnosed with a brain tumor brought an onslaught of emotional response from Capitol Hill and the presidential campaign trail Tuesday.

Senate Democrats and Republicans were having their weekly closed policy lunches in the Capitol when the news broke.

When Majority Leader Harry Reid, D-Nevada, told his Democratic colleagues about Kennedy, there was "stunned silence," one senator said. Read full article »

CNN's Ted Barrett, Deirdre Walsh, Ed Hornick and Anastasia Diakides contributed to this report.

All About U.S. Senate • Edward M. Kennedy