Boos descended from the stands as US President Donald Trump and FIFA chief Gianni Infantino took to the field for the World Cup trophy ceremony at New York New Jersey stadium on Sunday.
Spain beat defending champions Argentina 1-0 to win the title.
The boos had stopped when Trump and Infantino presented the players and coaches with their medals before they handed out the trophy.
Trump, who arrived at the stadium by helicopter, stayed on the podium with the Spanish players before being invited to the side as captain Rodri was about to lift the trophy in front of a barrage of photographers.
Trump was at the centre of the biggest controversy of the World Cup when he called Infantino to ask him to review a red card handed to US striker Folarin Balogun in a group stage match against Bosnia and Herzegovina.
Balogun's one-game red-card ban was suspended and he played against Belgium in the last 16, although the US lost 4-1.
Tempers flare at end of final
A brief brawl erupted at the final whistle of the World Cup final when Argentina midfielder Leandro Paredes shoved Spain's Gavi to the ground as the European champions' substitutes rushed onto the pitch to celebrate their 1-0 win on Sunday.
Argentina coach Lionel Scaloni intervened to cool tempers down at the end of a fierce encounter.
Midfielder Enzo Fernandez was dismissed for the South Americans in second-half stoppage time.
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