ABC News' Eloise Harper Reports: Before the Democratic National Convention got underway with a prayer and the national anthem, Democratic infighting took center stage in another area of Denver's Pepsi Center.
Supporters of former presidential candidate Sen. Hillary Clinton, D-N.Y., shouted "We will not fall in line" behind the party's presumptive presidential nominee, Sen. Barack Obama, D-Ill.
A small group of about 15 people, located within the crowd of approximately 200 gathered in front of MSNBC's news set, traded barbs over who deserves the nomination.
"You're not a Democrat!" a man holding up an Obama sign shouted at a Clinton supporter.
"Let the delegates vote!" "Rise, Hillary Rise!" "I own my vote!" the Clinton supporters responded.
The Obama backers replied with his campaign mantra "Yes We Can," but the Clinton supporters persisted.
"Caucus fraud, Caucus fraud!" they yelled.
Earlier Monday, Clinton reminded reporters that she won the popular vote during the primary season, but said that despite that outcome, there's "no doubt" that the convention belongs to Obama, and that the main goal is party unity.
A handful of Clinton supporters also dogged MSNBC "Hardball" host Chris Matthews, calling him a "sexist pig" and booing him as he walked onto the network's set.
A group of about ten protestors joined the fray, holding up signs saying, "Clintons 4 McCain."
One woman holding a sign said, "We've been big Hillary Clinton supporters, we've been told to get over it... We want out party back."