From Glenn Greenwald at The Guardian:
When Barack Obama ran for president in 2008, his pledges of openness and transparency were not ancillary to his campaign but central to it. He repeatedly denounced the Bush administration as "one of the most secretive administrations in our nation's history", saying that "it is no coincidence" that such a secrecy-obsessed presidency "has favored special interests and pursued policies that could not stand up to the sunlight." He vowed: "as president, I'm going to change that." In a widely heralded 2007 speech on transparency, he actually claimed that this value shaped his life purpose:
"The American people want to trust in our government again – we just need a government that will trust in us. And making government accountable to the people isn't just a cause of this campaign – it's been a cause of my life for two decades."
[…]
Along with others, I've spent the last four years documenting the extreme, often unprecedented, commitment to secrecy that this president has exhibited, including his vindictive war on whistleblowers, his refusal to disclose even the legal principles underpinning his claimed war powers of assassination, and his unrelenting, Bush-copying invocation of secrecy privileges to prevent courts even from deciding the legality of his conduct (as a 2009 headline on the Obama-friendly TPM site put it: "Expert Consensus: Obama Mimics Bush On State Secrets").