Hecklers Lash Out at DNC Speakers

Dissenters at the convention spoke out on TPP, war and Bernie Sanders.

A protester could be hear shouting "no, TPP!" while other protesters held up anti-TPP signs as Obama highlighted the need for party unity during his convention speech Wednesday evening.

The Trans-Pacific Partnership deal -- a proposed trade pact involving 12 countries on both sides of the Pacific Ocean -- has been a source of contention throughout the campaign and convention.

"We should all be 'feeling the bern' so we don't get burned by the other guy," Kaine said as delegations from California and Nebraska could be seen chanting and waving anti-TPP signs.

Delegates from Oregon briefly interrupted his remarks by chanting "No more war!" while other groups around the arena began chanting "Hillary!"

Unfazed, Panetta continued his speech, blasting Trump for what he said was the Republican nominee's lack of experience in global affairs.

ABC News' Shushannah Walshe and MaryAlice Parks contributed to this report.