[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/images/05/02/art.bob.barr.cnn.jpg caption="Former Rep. Bob Barr says the Republicans lack a 'coherent philosophy.'"]
(CNN) - Former Georgia Rep. Bob Barr said Saturday it’s hard to “overestimate the damage” that’s been inflicted on the Republican Party - not only with this week's defection of Sen. Arlen Specter, but also the “lack of any coherent philosophy, vision or leadership.”
“The Republican Party is in very deep trouble right now,” Barr said in an interview with CNN.
Barr, who was once a loyal soldier in the GOP, joined the Libertarian Party in 2006 and was the party’s presidential candidate in 2008.
The ex-Republican said he doesn’t feel like he relates to Specter's reasons for switching to the Democratic Party. “Where I came from there really was a philosophical basis for leaving the Republican Party,” Barr said.
Specter, who announced Tuesday he’s switching from a Republican to a Democrat, is making the move for political reasons, Barr said.
Specter said he had found himself increasingly "at odds with the Republican philosophy," but he also admitted the decision was driven partly by a desire to keep his seat.
The senator, who has represented Pennsylvania in the upper chamber since 1980, said he was "anxious" to stay in the Senate - and he did not want to face a Republican primary in order to keep his seat next year.
But Barr said he doesn’t think switching parties will give Specter an automatic win. “I don’t think that the people in Pennsylvania will really appreciate what he did,” he said.
Barr added that Specter’s decision is “just another sign that the Republican Party nationally lacks any semblance of leadership.” Democrats, he said, also don’t have a coherent agenda, but they have “something that Republicans absolutely lack.”
“They have a charismatic leader and they have party discipline. The Republican Party has none of that,” he said.
Asked if he ever considered returning to the GOP, Barr said, “That would make no sense as all, either from a philosophical standpoint or from the standpoint of wanting to join a party that knows what it’s all about.”