President Barack Obama was heckled by a protester during his historic swan song speech before the Democratic National Convention on Wednesday night in Philadelphia.

"No more TPP!" a protester shouted, in reference to the Trans-Pacific Partnership trade deal.

Others held anti-TPP signs as the president delivered his remarks.

Obama signs used to block anti-TPP sign in Florida delegation #DemsInPhillypic.twitter.com/uxTlbyGhq5 — George Bennett (@gbennettpost) July 28, 2016

The trade deal, supported by Obama, is unpopular with a large contingent of Democrats who have loudly voiced their opposition to it throughout the DNC.

Hillary Clinton previously supported a version of the deal, but reversed her position after the final details were made available.

The deal is unlikely to clear Congress during the election season, but some political observers think it might have a chance to pass during the lame-duck session of Congress.

Photos of Hillary Clinton and Barack Obama at the DNC:

11 PHOTOS Hillary Clinton and Barack Obama at the DNC See Gallery Hillary Clinton and Barack Obama at the DNC U.S. President Barack Obama (L) and Democratic presidential candidate Hillary Clinton wave to the crowd after the President spoke at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 27, 2016. REUTERS/Brian Snyder Democratic presidential nominee Hillary Clinton hugs U.S. President Barack Obama as she arrives onstage at the end of his speech on the third night of the 2016 Democratic National Convention in Philadelphia, Pennsylvania, U.S., July 27, 2016. REUTERS/Jim Young Democratic presidential nominee Hillary Clinton joins U.S. President Barack Obama onstage after his remarks on the third night of the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 27, 2016. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY Democratic presidential nominee Hillary Clinton hugs U.S. President Barack Obama as she arrives onstage at the end of his speech on the third night of the 2016 Democratic National Convention in Philadelphia, Pennsylvania, U.S., July 27, 2016. REUTERS/Jim Young U.S. President Barack Obama and Democratic presidential nominee Hillary Clinton appear onstage together after his speech on the third night at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 27, 2016. REUTERS/Carlos Barria Democratic presidential nominee Hillary Clinton greets U.S. President Barack Obama as she arrives onstage at the end of his speech on the third night of the 2016 Democratic National Convention in Philadelphia, Pennsylvania, U.S., July 27, 2016. REUTERS/Jim Young Democratic presidential nominee Hillary Clinton greets U.S. President Barack Obama as she arrives onstage at the end of his speech on the third night of the 2016 Democratic National Convention in Philadelphia, Pennsylvania, U.S., July 27, 2016. REUTERS/Jim Young U.S. President Barack Obama and Democratic presidential nominee Hillary Clinton appear onstage together after his speech on the third night at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 27, 2016. REUTERS/Mark Kauzlarich U.S. President Barack Obama and Democratic presidential nominee Hillary Clinton appear onstage together after his speech on the third night at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 27, 2016. REUTERS/Mike Segar U.S. President Barack Obama and Democratic presidential nominee Hillary Clinton appear onstage together after his speech on the third night at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 27, 2016. REUTERS/Mike Segar U.S. President Barack Obama and Democratic presidential nominee Hillary Clinton appear onstage together after his speech on the third night at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 27, 2016. REUTERS/Mike Segar Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

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