Just three years removed from the Institutional Revolutionary Party’s (PRI) stunning return to power, Mexicans will have a chance to provide some feedback at the ballot box this Sunday.

There will be 500 federal deputies (members of the lower house of Congress), 17 state legislatures, 300 mayors, and 9 governorships up for grabs. PRI is currently leading the National Action Party (PAN) by 7% according to recent polls, which is more reflective of popular apathy towards the opposition parties rather than a robust support base for the PRI’s President Enrique Peña Nieto.

About 85% of the Mexican public doesn’t trust President Nieto, and 60% believe that corruption has worsened since he took power in 2012, according to a poll conducted in late April by Consulta Mitofsky. These numbers may have even increased in the meantime following new reports that the president lied about how he acquired a vacation property in Valle de Bravo near Mexico City.

Members of the lower house serve three-year terms and cannot stand for re-election, which means that all 500 seats of the Chamber of Deputies are in play. Currently PRI is allied with the Green Party for a plurality and near-majority of 238 seats. Their grip on the chamber will be tested on June 7^th. But any seats that PRI loses due to President Nieto’s flagging popularity are expected to be made up from gains by the Green Party, which is polling quite favorably in the final stretch before elections, reaching 11% of the popular vote in one poll conducted earlier this year.