Maine Senator Oympia Snowe, now only one of two moderate Republicans left in the Grand Ole' Party, has penned an op-ed that appeared in today's New York Times in response to Arlene Specter switching parties after 29 years as a Republican.

IT is disheartening and disconcerting, at the very least, that here we are today — almost exactly eight years after Senator Jim Jeffords left the Republican Party — witnessing the departure of my good friend and fellow moderate Republican, Senator Arlen Specter of Pennsylvania, for the Democratic Party. And the announcement of his switch was all the more painful because I believe it didn’t have to be this way.

It was as though beginning with Senator Jeffords’s decision, Republicans turned a blind eye to the iceberg under the surface, failing to undertake the re-evaluation of our inclusiveness as a party that could have forestalled many of the losses we have suffered.

It is true that being a Republican moderate sometimes feels like being a cast member of “Survivor” — you are presented with multiple challenges, and you often get the distinct feeling that you’re no longer welcome in the tribe. But it is truly a dangerous signal that a Republican senator of nearly three decades no longer felt able to remain in the party.

Senator Specter indicated that his decision was based on the political situation in Pennsylvania, where he faced a tough primary battle. In my view, the political environment that has made it inhospitable for a moderate Republican in Pennsylvania is a microcosm of a deeper, more pervasive problem that places our party in jeopardy nationwide.

Read the full op-ed here.