In the 2008 Presidential election campaign, it seemed that Obama was wanting to stop many of the Bush-era counter-terrorism policies, such as torture, Guantanamo Bay, and excessive surveillance. He even got painted as a terrorist sympathiser, or at least someone who associated with terrorists, during the campaign.
However, now his administration is being criticised for its counter-terrorism policies, such as drone killings, surveillance, and prosecutions of those involved with revealing surveillance programs.
While some point to Republican opposition to change on some counter-terrorism policies (as mentioned in What has Barack Obama Done Regarding Torture and Indefinite Detention?), I find it hard to believe that that can explain everything.
So what is responsible for the differences between what Obama promised, and what the administration is currently doing? Was he making promises he intended not to honour? Has his views on what counter-terrorism policies are appropriate changed over time? Or is his policies changing so that he gets more support from moderate conservatives?