The cabinet shakeup could signal a hardening of the government's military stand against organized crime.
As its peers in the region see their oil production slipping Brazil's state-controlled oil company Petrobras is entering a new era as the region's silent giant.
The Party of the Democratic Revolution vote Sunday could affirm his aggressive tactics or choose a new leader.
A grass-roots group to monitor air quality has sprouted in one of Latin America's largest industrial corridors.
Should the national oil company allowing private investments? Critics worry about foreign control.