George Papadopoulos is a former foreign policy advisor who gained attention during the investigation into Russian interference in the 2016 U.S. presidential election. He was associated with the Donald Trump campaign and became a key figure in the Mueller investigation due to his contacts with foreign officials. In 2017, Papadopoulos pleaded guilty to lying to the FBI about his interactions with Russian officials. His case highlighted the broader issues of foreign influence in U.S. politics and raised questions about the connections between the Trump campaign and foreign entities.