There was a guy named Charles Gordon who wrote an essay back in 1968 when Mitt Romney's dad was running for president that talked about how it would be nearly impossible to stop an ineligible candidate from getting elected (if popular enough) because of the legal standing hurdles and because of how the impeachment process is so political. It's almost like it was an Idiot's Guide for Ineligible Candidates, and Obama, the 'brilliant' law student at Harvard most likely read this essay and developed a plan to do just that. It certainly helped that Bush was so unpopular with liberals and that liberals are so easy to sway because they are so impulsive and irrational. This made that much easier for Obama to galvanize support to help overcome any questons about his ineligibility.
Looking at the fact that Obama was given murky passage through the nominating process and given benefit of deceptive electoral voting actions and that all along in the process/procedures there was no action taken by responsible persons in the government anywhere along the line to clear the issues, it is apparent people will use and be enabled to forge such a political path for future situations unless such are stopped by some unsuspected means. The Constitution as worded just doesn’t seem to be useful as of now to many people.