MEXICO CITY (AP) — Tens of thousands of mostly opposition supporters protested Sunday against Mexico’s president in the capital’s vast colonial-era main plaza ahead of the June presidential election.

The protesters in Mexico City carried signs saying “We are Mexicans,” referring to what they claim are attempts by President Andrés Manuel López Obrador to divide the country.

Mexico is extremely polarized ahead of the June 2 presidential election. López Obrador regularly rails against reporters, the middle class, businessmen and people he calls “individualists” and social climbers.

The protest was originally called to defend independent electoral agencies the president wants to reduce or de-fund. But many protesters carried banners supporting opposition candidate Xóchitl Gálvez. Former Mexico City Mayor Claudia Sheinbaum of the president’s Morena party appears to be leading the race going into the June 2 vote.