Republicans are likely to take control of one or both houses of Congress when all the votes are counted, but Democrats on Wednesday were celebrating after their party defied expectations of substantial losses in the midterm election. The backlash over the Supreme Court’s decision in June to overturn 49 years of abortion rights was apparently a big reason. Inflation and the economy proved the most important voting issue, cited as the motivation of 51% of voters in exit polls conducted by the Associated Press and analyzed by KFF pollsters. But abortion was the single-most important issue for a q…