A number of Democrats are still feeling burned by the Democratic National Committee as evidenced by the boos they shouted Monday night at the mention of new party chairman Tom Perez.

Perez and Sen. Bernie Sanders, the runner-up of last year's Democratic presidential primary, are traveling the country together as part of a 'Come Together and Fight Back' unity tour.

On their first stop in Portland, Maine, the crowd was clearly feeling the Bern, and not so much the Perez.

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When Democratic National Committee Chairman Tom Perez's (left) name was brought up at a Maine rally it got booed, while Sen. Bernie Sanders' (right) name got cheered

Claire Cummings (pictured), a leader of the Maine Young Democrats, said 'maybe you came though because you're curious about the new DNC chairman' and the crowd booed

As part of the duo's opening, Claire Cummings, a leader in the Maine Young Democrats, said to the crowd, 'Regardless of why you showed up today, you showed up for a reason.'

'Something compelled you to find the space and time to be here, and I want you to ask yourself what that reason is,' she said.

Members of the crowd loudly yelled back 'Bernie!'

'Right?' she said laughing and pointing.

'Maybe it's because you love a certain senator from Vermont,' she mused.

For nearly 20 seconds the crowd responded back with claps and a crescendoing 'Bernie!' chant.

'You guys, I still have two minutes left, alright? Come on,' she said, trying to settle down the crowd.

'So maybe you came though because you're curious about the new DNC chairman and the future of the Democratic Party,' she suggested.

That's when members of the crowd booed.

Sanders voters, and Sanders himself, were sore that it looked like the Democratic National Committee had played favorites with the campaign of former Secretary of State Hillary Clinton during last year's primary.

The leaked Democratic National Committee emails exposed negative comments then-Chairwoman Debbie Wasserman Schultz, and other DNC officials, had made about Sanders.

When Perez eventually did take the stage, he was greeted with claps, but at the mention of Bernie Sanders, those in attendance went crazy again.

Perez described President Trump's first 100 days as 'chaos and carnage.'

'When I heard him talk about carnage day one, you sure as hell have no standing to talk about carnage, pal, because you're causing carnage day in and day out,' Perez said.

He instructed the crowd, 'Let's cause good trouble together,' before leaving the stage.

Then Sanders was announced to an onslaught of screams.

'Are you ready for a political revolution,' Sanders said, repeating an oft-used presidential campaign line. 'Then you've come to the right place.'