Regional parties and not the Congress would be the decision-makers in the coming Lok Sabha elections, Bengal Chief Minister Mamata Banerjee made it clear today. That Ms Banerjee wants regional parties to have a greater role on the national stage is known. But today, she made it plain, stating emphatically that the regional parties could end up winning more seats that the BJP or the Congress. It would give them the leverage to decide on the top post, she hinted.