Brazil President Luiz Inacio Lula da Silva is already staring down rising food prices, deepening investor skepticism and falling approval ratings. Now he’s getting another challenge: A change in congressional leadership that will test his ability to navigate the country’s conservative legislature.

Brazilian President Luiz Inácio Lula da Silva is bracing for another two years of struggle with the nation’s Congress, as lawmakers convene on Saturday to potentially elect leaders to both the House and Senate who have promised to continue exerting tight control of an overstretched federal budget.