Arlen Specter and the Peril of Democratic Party Dominance

Arlen Specter's recent decision to switch parties was viewed by many Democrats as a great victory. It moved the Democratic Party closer to the magic number of 60 Democratic senators which would mean a filibuster proof majority. It also further demonstrated that the Republicans have not yet finished the downward spiral which really began with the 2006 midterm elections. If a center right Republican like Arlen Specter feels compelled to leave the party because he believes it has been taken over by the extremists, then the Republicans still have a ways to go before becoming relevant again.