Presidencies fail or succeed largely on the backs of the people surrounding the president. President Grant, for example, was the victim of his greedy appointees. Some would argue that President Bush wouldn't be such a goddamn disaster if the people around him weren't so incompetent.
Senator Clinton can't possibly be "ready on day one" if she hires a White House staff/cabinet as awful as the political stupids who are destroying her campaign right now. To wit:
"I swear it is not happening now, but as we get closer to the convention, if it is a stalemate, everybody will be going after everybody’s delegates," a senior campaign official told the Politico. "All the rules will be going out the window."
The rules will be out the window, eh? Planning to destroy this village in order to save it, eh? Good luck with that, Clinton Campaign Smartie.