Today's Washington Post has some juicy behind-the-scenes detail on the battle between Hillary and Obama for black support, reporting on a private conference call among Hillary backers trying to cope with the pressure they say they're feeling to flip to Obama:

Last Friday, about 25 of them held an hour-long conference call to discuss what one described as an effort to "pester, intimidate, question our blackness" for not supporting Obama.

The catalyst for the call was a report in the New York Times that Rep. John Lewis (D-Ga.) was wavering in his support of Clinton...

This bit of news was extremely significant, for Lewis is one of the coveted "superdelegates," those 796 elected officials and party insiders who are not bound by anything that has or will happen at the polls...And with the nomination fight so razor-close, they are being wooed -- some say harassed -- like never before...

Some of Clinton's other black supporters decided to rally and try to blunt the fallout. Among those on the conference call were Trenton Mayor Doug Palmer, former Denver mayor Wellington Webb, and congresswomen Sheila Jackson Lee of Texas and Stephanie Tubbs Jones of Ohio.

Palmer was among the more forceful voices, urging others on the call, as he put it yesterday, "to stand up and say why you're for Hillary Clinton in the face of adversity. We can't afford to be wishy-washy . . . Stand up. Fight. Advocate for your candidate. Don't capitulate. . . . Don't let nobody intimidate or threaten you. Just hold on."

The only explicit example of such pressure cited in the article was Obama supporter Jesse Jackson, Jr.'s recent assertion that black super-dels not backing Obama might risk facing a primary challenge down the road.

So it's not clear what intimidation the folks on the call we're talking about. But it's interesting nonetheless that Hillary's black supporters are trying to persuade one another to hold the line.