On Saturday, witnesses told police, a man walked into a bar in Cascavel, 85 miles from Foz do Iguaçu, and asked who planned to vote for Lula, the newspaper O Povo reported. When a 39-year-old man said that he did, he, too, was stabbed to death. Police said Monday they had arrested a 59-year-old man in what appeared to be a politically motivated attack.