How far we have come:

Danielle Ross was alone in an empty room at the Obama campaign headquarters in Kokomo, Ind., a cellphone in one hand, a voter call list in the other. She was stretched out on the carpeted floor wearing laceless sky-blue Converses, stories from the trail on her mind. It was the day before Indiana's primary, and she had just been chased by dogs while canvassing in a Kokomo suburb. But that was not the worst thing to occur since she postponed her sophomore year at Middle Tennessee State University, in part to hopscotch America stumping for Barack Obama.

Here's the worst: In Muncie, a factory town in the east-central part of Indiana, Ross and her cohorts were soliciting support for Obama at malls, on street corners and in a Wal-Mart parking lot, and they ran into "a horrible response," as Ross put it, a level of anti-black sentiment that none of them had anticipated.

"The first person I encountered was like, 'I'll never vote for a black person,' " recalled Ross, who is white and just turned 20. "People just weren't receptive."

For all the hope and excitement Obama's candidacy is generating, some of his field workers, phone-bank volunteers and campaign surrogates are encountering a raw racism and hostility that have gone largely unnoticed -- and unreported -- this election season. Doors have been slammed in their faces. They've been called racially derogatory names (including the white volunteers). And they've endured malicious rants and ugly stereotyping from people who can't fathom that the senator from Illinois could become the first African American president.

The Republicans are counting on this. This is their base.