According to Marc Ambinder…

By my count, Obama has won the backing of six superdelegates since last week to Clinton's zero.

Actually, by my count, Clinton has negative-one.

That's because Obama's newest superdelegate, Washington D.C. councilman Harry Thomas, Jr., was a Clinton superdelegate until last night…

Thomas received more than 100 phone calls and e-mails from constituents who feared that he would use his power as a superdelegate to vote for Clinton despite the city's overwhelming support of Obama in the Potomac Primary.

"After meeting with the candidates and listening to my constituents, I have to honor the 83 percent who support Barack Obama," he said in an interview, referring to the results of the Democratic primary.

That's rough. And D.C. was one of her seventeen home states.