距离美国中期选举不到两周，前总统巴拉克·奥巴马已踏上竞选之路，在关键州密歇根州和俄亥俄州为民主党候选人拉票造势。
With less than two weeks to go before the US midterm elections, former President Barack Obama has hit the campaign trail, rallying support for Democratic candidates in the key states of Michigan and Ohio.
他批评了特朗普政府，将生活成本上涨归咎于白宫，而这是选民的一大关切。
He criticised the Trump administration, blaming the White House for rising living costs, a major concern for voters.
民主党人希望重新夺回国会控制权，民调显示有多场选情胶着的竞争。奥费莉·雅各布森带来更多报道。
Democrats are hoping to regain control of Congress, with polls showing several closely contested races. Ophelie Jacobson has more.