It may be partly that he saw the Bush unilateralism and wanted more consensus-based governance.

The problem being that, in the executive bubble, where most of seats and nearly all of the money is held by the military-industrial complex, that's the consensus you will get.

The more pressing problem is that many tough solutions aren't solved by committee, they're solved by leadership and expertise, a point where Congress fails, the executive branch fails, and where the roots of government (e.g. Constitution) start to fail under the stress of lobbying and corruption.

Well, neither the RNC or DMC would nominate a Lincoln or MLK but love their Arnolds.