Since late last year, the main pollsters in Mexico began to spread their measurements towards the midterm elections of 2015, where the 500 seats in the Chamber of Deputies will be renewed. In the graph below, effective preferences for the top political forces are tracked during this period. Some key findings may be highlighted from it:
- Preferences for the PRI have declined between 10 and 12 percentage points (see Reforma, and El Universal-Buendía and Laredo). This could be a result of several protests and scandals that have affected the Federal government and have clouded the political landscape of the party in power. Still, the party continues to lead the race with around 31% of the potential vote share.
- Preferences for the PAN have increased modestly between 1 and 3 percentage points when polls (see Reforma,El Universal-Buendía and Laredo, and El Financiero-Parametría). The party is consolidated as the second electoral option with a median of 26% of the potential vote share.
- Preferences for the PRD have remained relatively stable, down by 2 points according to Reforma but around 13% of the potential vote share. It is clear that, from an electoral standpoint, the main challenge for PRD is to keep being the biggest leftist party, whose votes are compromised with MORENA, the party formed by Andrés Manuel López Obrador.
- Following the previous point, it is reinforced the idea that the vote share of the left in Mexico will be fragmented. On the one side with the PRD and on the other one with MORENA. This last party is shaping up to be one of the first ones in the Mexican electoral history of having no problem reaching the 3% threshold required to keep the national registry and according to all polls is even fighting tooth and nail to become the third or fourth political force. According to surveys, MORENA alone would reach around 9% of the potential vote share.
- The PVEM or Partido Verde Ecologista de México, lies a solid 10% in the polls, which puts it in direct competition with both MORENA and slightly away from the PRD to fight for the third position.
Finally, the last three polls fromEl Universal-Buendía Laredo, Consulta Mitofsky, and El Financiero-Parametría are reproduced in the graph below, from there it can be highlighted some other conclusions:
Firstly, The PT or Partido del Trabajo concentrates another 3% that would tentatively be also from left-minded voters. Secondly, MC or Movimiento Ciudadano could reach another 3%, although it is not clear that those votes only represent leftist voters. Finally, the polls show about 2.5% for the PANAL or Partido Nueva Alianza and 1% for other new parties (Partido Humanista and Encuentro Social). In the first case, it is possible that the PANAL may keep its registry through alliances and in the second case, it is less likely that those new parties would be able to reach the required threshold.
In conclusion, the fight for the Congress will be competitive; no party is shaping itself to have a relative majority. Alliances will become key both to fight for specific districts but also to vote once the new legislature is in place.
Parties like the PVEM and PANAL have the opportunity to ally with the major parties and advance their agendas. On the other hand, the PRD and MORENA are competing to be the biggest party of the left in Mexico and the epicenter of that fight will be Mexico City, where the local congress and municipalities also change in this election. Apparently, PT and MC will keep their registry and the other smaller parties will lost it. Finally, the PAN has the challenge of becoming more competitive and fight the first place in preferences that the PRI still has.