Via the NYT:
"The main impact of the midterm election in the modern era has been to weaken the president, the only government official (other than the powerless vice president) elected by the entire nation. Since the end of World War II, the president’s party has on average lost 25 seats in the House and about 4 in the Senate as a result of the midterms. This is a bipartisan phenomenon — Democratic presidents have lost an average of 31 House seats and between 4 to 5 Senate seats in midterms; Republican presidents have lost 20 and 3 seats, respectively."
Americans recognize that a Constitution that endeavors to limit federal government power restrains Democrats. This is a feature to Americans, a bug to Democrats.