Peruvians went to the polls Sunday in a presidential election overshadowed by a decade of political instability that has steadily eroded the power of the executive branch in favor of a increasingly dominant Congress. In a historic shift, voters also chose members for a new Senate — the first bicameral legislature since President Alberto Fujimori dissolved it in 1992 — a change analysts warn could deepen political conflict rather than resolve it. Researchers predict a new three-way power struggle between the lower house, the Senate, and whoever wins the presidency, with one expert cautioning that the country is set to move "from a crisis of two to a crisis of three."