Skeptic David Sirota writes for the Nation that Sen. Obama didn't back down from an interview, despite Sirota's previous attacks on Obama.
Obama was calling because he was bothered that I had written a few blog
posts questioning positions he'd taken that appeared to belie his
progressive image, most prominently his vote for a corporate-written
"reform" of class-action lawsuits, his refusal to frontally challenge
the Iraq War after running as an antiwar candidate and his vote to
confirm Condoleezza Rice as Secretary of State. One by one, Obama
methodically answered each criticism. And when the call ended with his
telling me he was committed to working with progressives, I was
perplexed. Obama certainly talks a great game--but then, so have many
false prophets over the years. I requested a formal interview, and to my
surprise, Obama readily agreed. By the end of a day in Washington with
him, I had the answers to two key questions: What can progressives
expect from Barack Obama, and what does he really aspire to be?
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In a piece entitled "Getting rid of corruption", Sirota later admits that Sen. Obama is willing to fight a principled fight on campaign fiance reform.
One issue that he appears willing to consider spending his political
capital on is campaign finance reform. As an Illinois state legislator,
he authored a bill to publicly finance his state's judicial elections.