In a 2006 interview, Obama highlighted the diversity of his extended family : "It's like a little mini-United Nations", he said. "I've got relatives who look like Bernie Mac , and I've got relatives who look like Margaret Thatcher ."  Obama has a half-sister with whom he was raised ( Maya Soetoro-Ng , the daughter of his mother and her Indonesian second husband) and seven half-siblings from his Kenyan father's family—six of them living.  Obama's mother was survived by her Kansas-born mother, Madelyn Dunham,  until her death on November 2, 2008,  two days before his election to the Presidency. Obama also has roots in Ireland; he met with his Irish cousins in Moneygall in May 2011.  In Dreams from My Father , Obama ties his mother's family history to possible Native American ancestors and distant relatives of Jefferson Davis , President of the Confederate States of America during the American Civil War . 
Bush could take a punch. He recognized and appreciated the fact that the media can say and do what they want and that folks have a right to dislike, even hate him if they want. Bush didn't care about polls, he cared about doing the best job he could. Obama is utterly ridiculous in how wussy he is. You would figure that an individual who is the top dog in the country would be able to 'roll with the punches' and embrace the truth that no matter what you do you cannot please everyone. Bush accepted this simple (and to most people who manage at ANY level), OBVIOUS fact, but for some reason Barry expects everyone to fall in line and agree 100% with everything he does. And if they dont, he is more than willing to allow the storyline of "must hate him/his policies because he's black" to be preached by others. There are so many ways in which they are different and I dont have the time nor the energy to go on and on but in short, Bush had BALLS, Obama is sackless. Sorry for the crude delivery of that truth but that's a big difference between the two in a nutshell. Pun fully intended.
If repression in Iran works - and it has worked before - the strategic context for talks is far worse. Iran's supreme leader, Ayatollah Ali Khamenei, has clearly decided that Ahmadinejad's political base is also his own political base, the grassroots source of the regime's continued legitimacy. This means, in essence, that the ayatollah is now dependant on Ahmadinejad instead of the other way around; or, perhaps, co-dependent is the proper term. Iran's apocalyptic president will emerge emboldened if the regime ultimately prevails. On nuclear weapons, on anti-Semitism, on support for terrorism, Ahmadinejad will feel vindicated, not chastened.