Specter: I'm not an automatic 60th vote - POLITICO
Biomedical Research Loses Long-Time Ally With Death of Arlen Specter | Science | AAAS
Pennsylvania senator Arlen Specter switches party to become Democrat | US Congress | The Guardian
Specter is 13th senator to switch since 1913 - CNN.com
Arlen Specter | US Senator, Lawyer & Politician | Britannica
Analysis: Specter leaves a shrinking GOP tent - The San Diego Union-Tribune
Veteran GOP Sen. Specter says he will switch parties
Arlen Specter Switches Parties
Arlen Specter, Senator Who Gave No Quarter, Dies : NPR
Life Among the Cannibals
Specter says party switch driven partly by desire to keep seat - CNN.com
Senator Arlen Specter on Switching Parties - YouTube
Arlen Specter dies at 82 | WJLA
Senator Specter Announcement on Party Switch | C-SPAN.org
Specter Switches Parties - The New York Times
Analysis: Arlen Specter spent his career skillfully playing both sides of the corridors of power - pennlive.com
Minnesotans who've 'switched' can relate to Specter's decision | MinnPost
Arlen Specter, Senator Who Gave No Quarter, Dies | WAMU
Senate Republican Leaders on Senator Specter Party Switch | C-SPAN.org
Pa.'s Specter: Cancer and political survivor - The San Diego Union-Tribune
Why Pennsylvania Senator Arlen Specter Switched Parties - TIME
A History Of Party-Switching Senators : It's All Politics : NPR
After Party Switch, a Senator's Confused Alliances - The New York Times
GOP Sen. Arlen Specter Switches Parties, Joins the Democrats - WSJ
