EMERGING MARKETS-Brazil assets sink as corruption arrests reignite political worries

SAO PAULO, Nov 25 (Reuters) - Brazilian stocks fell and the currency weakened on Wednesday after the arrests of a key ruling party senator and an influential banker rekindled fears that President Dilma Rousseff's administration could face further problems passing austerity measures in Congress. After the market close, Brazil's central bank kept interest rates on hold in a split vote that shows policymakers are uneasy with galloping inflation despite a worsening recession, and might raise rat