By RUSSELL BERMAN
Staff Reporter of the Sun
March 10, 2008
WASHINGTON — One key to Senator Obama's chances of defeating Senator Clinton in the crucial Pennsylvania primary next month will be his courtship of Catholic voters, a sizable bloc that has loyally supported the former first lady throughout the primary season.
Catholics could make up more than one-third of the vote in the Keystone State on April 22, and Mrs. Clinton's victories in Ohio, Texas, and Rhode Island on Tuesday made clear that despite a stepped-up effort in recent weeks, Mr. Obama has failed to narrow her edge with that demographic.