DHAKA, Bangladesh (AP) — When Tarique Rahman , the son of a former prime minister of Bangladesh, returned to the country in December after 17 years of self-imposed exile, he declared to his supporters: “I have a plan.” Rahman returned at a time of upheaval. Bangladesh was seemingly adrift under an interim administration as it inched closer to a nationwide poll. Many Bangladeshis felt his return offered the country a new chance. His fiercest rival, the former Prime Minister Sheikh Hasina , would