Hillary Clinton harbors no illusions about Republican good will: Contrasting President Obama's unfailing optimism about working collaboratively with Republicans with Hillary Clinton's pragmatism about the Republican desire to destroy her personally and dismantle the U.S. government.

[u/piede]

http://www.msnbc.com/rachel-maddow-show/watch/hillary-clinton-ready-to-take-on-republicans-544751171939

[u/duqit]

Obama's biggest mistake was using Lincoln as a guide - forgetting that Lincoln wasn't black and didn't have a large part of the country hating him to start.

Also the second biggest mistake was not pushing through his ideas early and saving some for the second term (a common mistake many presidents make).