Maybe she shouldn't have put that idea out there, huh?Prince George's County Executive Jack B. Johnson, a Democratic convention delegate pledged to support Sen. Hillary Rodham Clinton, said yesterday that he thinks Sen. Barack Obama has "in a real sense" won the Democratic nomination and that he now plans to support Obama at the August convention.
Johnson, who endorsed Clinton nine days before Maryland's February primary, said he will urge Gov. Martin O'Malley and Sen. Barbara A. Mikulski, who co-chair Clinton's Maryland campaign, to bring all of her delegates to Obama's camp for the sake of party unity.
"I cannot in good conscience go to the convention and not support Barack," Johnson said in an interview. "She ran a great campaign, but she fell short of the line."
This is Johnson's second change of heart in the race. He had allowed his name to be listed as a supporter by the Obama campaign in December.
Unlike superdelegates, who are free to endorse either candidate, Johnson is one of 28 pledged delegates who have agreed to represent the 36 percent of Maryland Democrats who voted for Clinton on Feb. 12.
Some Clinton delegates were chosen by voters at the ballot. Others, such as Johnson, were selected in consultation with the Clinton campaign by the Maryland Democratic State Central Committee, party spokesman David Paulson said.
But Paulson said that pledged delegates are under no obligation to stick by their candidate and that Johnson is free to defect if he chooses.
"The freedom to change your mind or change your vote does exist," Paulson said. "They're not like superdelegates, but they do have this flexibility."
Obama swamped Clinton in Maryland, capturing 61 percent of the vote statewide and 79 percent of the vote in Prince George's County. Given the results in Maryland and elsewhere, Johnson said, the Maryland party would be unenthusiastic about the November election if Obama were not the nominee.
A decision by O'Malley or Mikulski to release all of Maryland's Clinton delegates could be the start of a national wave to unify behind Obama, Johnson said.
"If we do that, I think we could shift some other states and bring the race to an end," he said.
Johnson's call was rejected by some Clinton's other supporters in the state. Melissa Schwartz, a spokeswoman for Mikulski, said the Maryland senator "remains 100 percent behind Senator Clinton."
Del. Carolyn J.B. Howard (D-Prince George's) also rejected Johnson's call.
"I'm still committed to Senator Clinton until she decides that she's no longer in the race," Howard said. "You don't quit before it's over."
Several Maryland superdelegates have endorsed Obama in recent days, but Johnson is the first pledged delegate to switch sides.
In February, Johnson endorsed Clinton alongside Lt. Gov. Anthony G. Brown (D), telling a crowd of 100 supporters that she would "fight for us on the issues."
The late support surprised many at the time, in part because of his county's enthusiastic support of Obama.
It also came two months after Johnson's name appeared on a list distributed by the Obama campaign of Maryland politicians supporting his effort. An aide at the time confirmed that Johnson had authorized the use of his name by Obama's campaign.
Johnson said yesterday that the February endorsement had been a difficult decision, driven by his personal loyalty to Clinton and former president Bill Clinton. He said he is unconcerned that his support for either candidate might appear less than steadfast.
"My job is to bring unity, and we will not have unity in Maryland if Barack Obama is not the nominee," he said.
Attorney General Douglas F. Gansler, the co-chairman of Obama's campaign in Maryland, called Johnson's support "helpful," noting the executive's position as the leader of the prominent African American jurisdiction, which has the largest concentration of registered Democrats in the state.
But Gansler said he thinks the unity Johnson seeks will come before the August convention regardless.
"His leadership coming over now cannot be ignored and should be followed," Gansler said.
"Does it need to be followed today? I don't think so. Inevitably, all the Clinton delegates will come over to the Obama camp."
The Obama camp has also rolled out four Superdelegate endorsements today, clearly to snatch headlines and offset the expected loss.
I seem to remember reading an op-ed or something from a pledged delegate right after Clinton said this. He was pledged to Clinton, said he didn't know he could choose to vote otherwise, thanked her for informing him, and then said he'd vote for Obama. It was classic. 
Now to see if I can find it.
