CNN) — Christopher Buckley, the son of conservative icon William F. Buckley, said Tuesday he's resigned from the conservative National Review days after endorsing Barack Obama's White House bid, among the most powerful symbols yet of the conservative discontent expressed this election cycle.

In an online column, Buckley said he had decided to offer his resignation from the magazine his father founded after hundreds of readers and some National Review colleagues expressed outrage he was backing the Illinois senator.

"While I regret this development, I am not in mourning, for I no longer have any clear idea what, exactly, the modern conservative movement stands for," Buckley wrote.

"Eight years of 'conservative' government has brought us a doubled national debt, ruinous expansion of entitlement programs, bridges to nowhere, poster boy Jack Abramoff and an ill-premised, ill-waged war conducted by politicians of breathtaking arrogance. As a sideshow, it brought us a truly obscene attempt at federal intervention in the Terry Schiavo case," he also wrote.

The resignation comes four days after Buckley formally endorsed Obama on the Web site The Daily Beast, writing the presidential campaign had made John McCain "inauthentic," and Obama appeared to have a "first-class temperament and first-class intellect."

In a statement posted on the publication's Web site Tuesday, National Review editor Rich Lowry noted Buckley was writing for the magazine on a trial basis, and took his offer to resign with the "warmest regards and understanding" sincerely. Lowry also took issue with Buckley's contention the magazine had been flooded with angry mail over Buckley's endorsement, saying it had received a relatively small 100 e-mails expressing disapproval.

"It's an intense election season and emotions are running high," Lowry said.

Source: http://politicalticker.blogs.cnn.com/tag/cnn-ticker-producer-alexander-m...