PHILADELPHIA _ Democrats opened their national convention Monday with a cascade of boos and catcalls, as Hillary Clinton faced continued resistance from Bernie Sanders supporters and party leaders suffered a backlash from a leaked trove of emails showing their favoritism toward the former secretary of state.
For a second day, the leaked emails _ now the subject of an FBI probe _ overshadowed efforts to rally delegates behind the presumptive nominee and end her long campaign fight with Sanders, the Vermont senator, on an upbeat note.
Democrats assembled a prime-time lineup that included first lady Michelle Obama, a keynote address by Massachusetts Sen. Elizabeth Warren _ a favorite of the populist left _ and a supportive speech by Sanders under the umbrella of a "United Together" theme.
But the notion of unity seemed more aspirational than real.
The leaked emails cost party Chairwoman Debbie Wasserman Schultz her job, effective at the convention's close, and led some Sanders supporters to redouble their efforts to deny Clinton the nomination or, at the least, use a roll-call vote this week to put their dissent on full public display.
Even Sanders was unable to appease to his restive backers.
As he addressed a crowd of supporters before his prime-time appearance, the cheers that greeted his call to defeat Republican nominee Donald Trump _ "a bully and a demagogue," Sanders called him _ immediately turned to boos when he urged the election of Clinton.
The booing spilled over to the formal proceedings when the convention was gaveled open, arising at each mention of Clinton's name.
At one point, the presiding officer, Rep. Marcia Fudge of Ohio, chided the raucous crowd. "We are all Democrats," she said. "We need to act like it."
But the dissenters were undeterred.
From the California delegation came a chant of "lock her up" _ the derisive call that became a rallying cry at last week's Republican convention
Earlier in the day, Wasserman Schultz was also greeted with boos and heckled with cries of "shame" when she arrived at a breakfast of her home-state Florida delegation.
The congresswoman from the Miami area was quickly shouted down as she began speaking of an overnight shooting at a Fort Myers, Fla., nightclub _ "People lost their lives ... " she began before being drowned out.
When Florida's party chairwoman, Allison Tant, sought to intervene, someone shouted out, "We didn't have our voice!" _ alluding to suggestions the primary was rigged in Clinton's favor.
Wasserman Schultz briefly carried on before giving up and leaving under a security escort; in a further slap, she was stripped of the traditional honor of wielding the gavel to open and close the convention.
Several lawmakers, including House Democratic Leader Nancy Pelosi, received a similarly rowdy reception when they spoke at California's delegation breakfast. Sanders supporters waved "Bernie or Bust" signs and chanted the senator's name whenever a speaker mentioned the presumptive party nominee.
Pelosi responded evenly, with a gentle reproach.
"People get excited about the campaigns that they are in, and it doesn't turn off the day the determination is made," the San Francisco lawmaker said. "Some people are new and just are not familiar with how things work. You make your case, you take your vote, you make a difference, you demand a compromise, you bring the policy or rules closer to you. That is success."
As Sanders' delegates tried to decide how much _ and how visibly _ to protest this week, California's biggest-in-the-nation delegation took a lead role in the informal deliberations. With roughly 200 Sanders backers, the state's contingent makes up nearly one in 10 of the Vermont senator's contingent in Philadelphia.
"We have everything from the 'Bernie or Busters' to what I call the eventual-nominee types," said Karen Bernal of Sacramento, the co-leader of the Sanders California delegation.
Though party leaders want the focus to be unity, "Bernie delegates came here with an entirely different agenda," Bernal said, speaking at a news conference called by a group of Sanders supporters. "We came here to push a progressive agenda."
Clinton, meantime, sought to focus attention on her policy agenda in a speech to veterans in Charlotte, N.C.
"I am not a newcomer to these issues," she told the Veterans of Foreign Wars gathering, drawing an implicit contrast to Trump. "I believe the United States of America is an exceptional nation with capabilities that no other nation comes close to matching. We have the world's greatest military. Don't let anyone tell you otherwise."
"I'm not interested in talking provocatively," Clinton added. "I'm not interested in insulting people, including our military. I'm interested in bringing our country together. I'm interested in healing the divisions."
In one small sign of the party coming closer together, Clinton picked up the endorsement Monday of a notable holdout, former Vice President Al Gore, who enjoyed a fraught relationship with the former first lady when he served with her husband, former President Bill Clinton.
"I am not able to attend this year's Democratic convention but I will be voting for Hillary Clinton," Gore tweeted. The former vice president, who won the popular vote in 2000 but lost the White House to George W. Bush, was also a no-show at the Democrat's convention in 2012.
