But in San Francisco the lines seem clear.

There were murmurs from Harris's corner and an awkwardness that hung thick in the air. This was because unlike Feinstein, Newsom, and most of the powerful establishment Democrats in San Francisco, who have endorsed Hillary Clinton for president, Harris was an early and high-profile supporter of Barack Obama.

That difference seems especially significant to San Francisco progressives and others who are wary of another Clinton returning to the White House and excited about the upstart candidacy of a younger black man who got into politics pounding the streets of Chicago as a community organizer.

Political endorsements are often like ideological tea leaves. Sometimes support stems from a personal relationship with the candidate, but usually it signals more of a philosophical affinity, a desire to either take a chance with something new or stick with a known quantity, which seems to be the case with this presidential primary election.

"It boils down to this: are you part of the Willie Brown, John Burton political machine, in which case you're with Hillary, or are you part of the free-thinking folks who really want to see change?" Board of Supervisors president Aaron Peskin -- who considers himself part of the latter group and has endorsed Obama -- said to the Guardian.

Peskin noted that all of the elected officials in San Francisco who got their jobs through a Newsom appointment -- Sups. Sean Elsbernd and Michela Alioto-Pier, Assessor Phil Ting, and Treasurer José Cisneros -- have endorsed Clinton, whose campaign has been notorious locally for pressuring top Democrats to get on board.

....

But Sup. Chris Daly -- who, like Peskin and many others, backed Edwards four years ago and supports Obama this time -- thinks an Obama victory would be hugely important both locally and nationally in terms of opening up the Democratic Party and the country to new ideas.

"Hillary Clinton clearly represents the establishment, closely aligned to the [Democratic Leadership Council], and Obama represents a change from that. If Obama wins, it would send a serious wave of change through the Democratic Party and open up opportunities for progressives," Daly told us.

He also said progressive Democrats are "like the redheaded stepchildren of the party," consistently marginalized by leaders like Speaker of the House Nancy Pelosi, Feinstein, and Newsom. Daly said he liked the policies and messages of Edwards and Dennis Kucinich but identifies with Obama's roots as a community organizer and feels he's the best hope for change. Daly said an Obama victory would "mainstream activist politics, which is what I practice."

So is it playing out this way elsewhere?  Examples?