Mexico's lower house of Congress has rejected Claudia Sheinbaum's electoral reform proposal, a significant blow to the president. The proposal sought to amend Mexico's Constitution and included reducing the size of the Senate, changing the way plurinominal deputies are elected, reducing election costs, and cutting funding for political parties. While a majority of deputies voted in favor of the bill, it required two-thirds of the vote to pass. The ruling Morena party's allies, the Labor Party (PT) and the Green Party (PVEM), also opposed the bill. This rejection marks the first time these parties have not supported an initiative backed by the ruling party. SheInbaum plans to submit her "plan B" proposal to Congress, which includes changes to secondary laws.