"The rulling class" was in the tank for Obama before he was famous.
Seeing as how Obama lost his first couple of elections, had to contend with a serious threat in Republican Jack Ryan (ex-husband of Jeri!), the interference of Jesse Jacksons Jr. and Sr., and how everyone thought Joe Biden, John Edwards, and most powerfully Hilary Clinton would utterly beat Obama in the Democratic nomination, I fail to see how anyone was in the tank for Obama before he became famous.
The Hilary Clinton/Barack Obama race that ran neck and neck for months alone disputes any sort of conspiracy that Obama was maneuvered into an Illuminati-like stake for the presidency. It's quite easy to map out his rise in popularity: when Jack Ryan dropped out, Illinois Republicans needed someone to compete. They pulled up carpetbagger Alan Keyes, who stood no chance whatsoever since he was not only an extremist, he was also a non-native sent to IL specifically to run for the Senate. Obama won the race by an incredibly large margin as a result. And because of such an overwhelming victory, he was invited to be the keynote speaker at the DNC, increasing the national spotlight.
Consider this: had Jack Ryan not dropped out (or, y'know, have a torrid sex scandal to begin with) or had Republicans put even the slightest bit of sense in choosing Ryan's replacement, they either would have won at best or allow Obama to win with a far smaller, more traditional margin (say, within 10%), thus preventing Obama from being thrust into the spotlight. If the Republicans didn't pull off one massive blunder after another, Obama probably wouldn't be president today for any given reason. At the Senate level they handed Obama victory on a silver platter. But no, Republicans can do no wrong, and somehow someway this was all some sort of elaborate, decades-long conspiracy to get a guy named Barack into office.
There were a lot of "ifs" in Obama's election.
For instance, if Michigan and Florida hadn't moved up their primaries too far and lost their delegates, Clinton would have won both easily and had a commanding early lead. Obama won the Democratic nomination having lost in New Hampshire, New York, New Jersey, Ohio, Texas, and California.
Hardly seems like a good conspiracy plan....

People were tired of the Clintons, of the "old guard"...
And of course, McCain selecting Palin as his running mate is what sealed the general election for Obama. Had he picked any kind of decent running mate....who knows...it might have been different.