Barack Obama

Obama demonstrates as well that he is open-eyed about the terrorist threat posed to the nation and would not shrink from military action when it is warranted. He does not oppose all wars, he has famously stated, but rather "dumb wars." He also has the edge in economic policy, less because of particular planks in his platform than because of his understanding that some liberal orthodoxies developed during the last 40 years have been overtaken by history. He offers leadership on education, technology policy and environmental protection unfettered by the positions of previous administrations.

By contrast, Clinton's return to the White House that she occupied for eight years as first lady would resurrect some of the triumph and argument of that era. Yes, Bill Clinton's presidency was a period of growth and opportunity, and Democrats are justly nostalgic for it. But it also was a time of withering political fire, as the former president's recent comments on the campaign trail reminded the nation. Hillary Clinton's election also would drag into a third decade the post-Reagan political duel between two families, the Bushes and the Clintons. Obama is correct: It is time to turn the page.

An Obama presidency would present, as a distinctly American face, a man of African descent, born in the nation's youngest state, with a childhood spent partly in Asia, among Muslims. No public relations campaign could do more than Obama's mere presence in the White House to defuse anti-American passion around the world, nor could any political experience surpass Obama's life story in preparing a president to understand the American character. His candidacy offers Democrats the best hope of leading America into the future, and gives Californians the opportunity to cast their most exciting and consequential ballot in a generation.

In the language of metaphor, Clinton is an essay, solid and reasoned; Obama is a poem, lyric and filled with possibility. Clinton would be a valuable and competent executive, but Obama matches her in substance and adds something that the nation has been missing for far too long -- a sense of aspiration.