there are many reasons the bush people won't quite go away...partly they condition so much about what the obama administration is up against (both directly and as a kind of fucked up culmination of longer-term processes) that to invoke the latter is also to invoke the former---and partly because the bush people are a gift that keeps on giving on other, even more foul grounds. read the following--it's not pleasant, but it's better to know:
US Torture: Voices from the Black Sites - The New York Review of Books