The Mexican government has paused its relationship with the U.S. and Canadian embassies in the country, President Andres Manuel Lopez Obrador said on Tuesday, after their ambassadors criticized a proposed judicial reform that he backs, writes Reuters.

“There is a pause”, Lopez Obrador said in a press conference, clarifying that the freeze was with the embassies and not with the countries.

The president is pushing a reform to elect judges, including Supreme Court justices, by popular vote. A committee in the lower house of Mexico’s Congress passed the proposal late on Monday, paving the way for it to be approved when the newly elected Congress takes office in September.

Proponents say the reform will boost democracy and help fix a system that they argue does not serve the public, while critics say it will skew power in favor of the executive, cut off judges’ careers, and make the courts more susceptible to criminal influence.

U.S. Ambassador Ken Salazar last week labeled the reform a “major risk to the functioning of Mexico’s democracy” and cautioned of a potential risk to the U.S.-Mexico trade relationship. The U.S. and Mexico are each other’s largest trade partners. Canada’s ambassador to Mexico, Graeme Clark, also warned of investment concerns.

Later on Tuesday after Lopez Obrador’s comments, Salazar posted a diplomatic note from the embassy, dated Aug. 23. “The US supports the concept of judicial reform in Mexico, but we have significant concerns that the popular election of judges would neither address judicial corruption nor strengthen the judicial branch of the Government of Mexico”, the note read.