At whose campaign rallies are controversial "red envelopes" with cash changing hands?

The correct answer is linked to Eric Adams, who was running for mayor of New York City. Controversial red envelopes reportedly contained cash and were distributed at campaign rallies associated with his candidacy. This practice raised ethical concerns and scrutiny regarding campaign finance laws and the influence of money in elections. Such incidents often attract public attention and discussion around the integrity of the electoral process, especially in a high-stakes race like the New York City mayoral election.

In contrast, the other candidates listed, such as Andrew Yang, Bill de Blasio, and Kathy Hochul, did not have similar controversies surrounding cash envelopes during their campaign activities. This distinction highlights the unique nature of the situation related to Eric Adams and emphasizes why he is the correct choice in the context of this question.