The DNC has barely started and delegates are already booing Hillary Clinton

The Democratic National Convention’s first day in Philadelphia was supposed to be a grand demonstration of party unity and shared determination to defeat Donald Trump.

But delegates in attendance didn’t get the message. Instead, just moments after the convention officially opened, it devolved into internecine warfare.

Though Bernie Sanders is scheduled to speak later in support of Hillary Clinton, after endorsing her earlier this month, there seems to still be some lingering resentment. Even the promise of a speech from Elizabeth Warren, a progressive hero to many of Sanders’s supporters, didn’t seem to be enough to placate Sanders die-hards as the convention kicked off Monday afternoon.

Every time Hillary Clinton’s name was mentioned at the outset, delegates booed loudly from the floor:

The “lock her up” chant — a favorite of delegates to the Republican National Convention that was heavily criticized — has made an appearance at the Democratic convention as well:

Sanders himself tried to calm the chaos, asking his supporters to corral the demonstrations and to stop them from unfolding:

But as several observers pointed out, Sanders had encouraged his supporters to believe that he could win the nomination — and now is struggling to wind them down now that he’s fallen in line behind Clinton:

All in all, between the growing protests outside and the chaos on the convention floor, Philadelphia is offering the spectacle of a divided party that the Republican convention in Cleveland did not. Even when boos broke out during Sen. Ted Cruz’s speech to the RNC, they were in favor of the party’s nominee: