Police violently stormed the square on the orders of the Governor Luisias Ruiz using teargas and helicopters... dozens were wounded. Instead of disbanding the teachers ahead of the July 2nd election, the confrontation entrenched them more, and now they're calling for the Governor's resignation, loudly.
The story went on to explain that because of the confrontation people in Oaxaca will not support either the PRI or PAN, the two ruling parties and will instead turn towards the PRD and Mr. Obrador.
The teacher pay issue that sparked the protest has been an ongoing event for some time, when I was in Oaxaca in January I witnessed a protest on this very issue. The teachers swinging left towards Obrador could make a huge difference tomorrow. If you know any Mexicans tell them to vote for Obrador tomorrow, he's going to need all the help he can get.