Wow. I have seen such "pretty to think so" cynicism about "the way of it" since Rumsfeld stepped down and Cheney retreated (further) from the light of the public eye. Anyone thinking she's prematurely auditioning for a Zell Miller moment at the Republican Convention?
People backing Obama see themselves in fight. If nomiated, and elected, those people expect Obama to fight for the new politics he's envisioned. Clinton, among a crowd of supporters, may have thought she was just tossing a barb at Obama. But as phrased, she's not just attacking Obama, she's attacking the very idea of optimism and hope. There are ways of demanding more specifics on how Obama wants to enact "change" in America. This isn't one of them. To the minds of many outside of the old guard DLC Democratic party, this is a highly effective anti-Clinton ad courtesy of the Clinton campaign itself.