The midterm elections were bad for President Barack Obama and his Democratic Party. Very bad. Virtually every Democratic incumbent in key battleground Senate races lost. Mary Landrieu in Louisiana still could survive if she wins a runoff election in December. It won’t matter. Republicans have got the net gain they needed to win control and had won at least seven with Alaska and Virginia still too close to call Wednesday morning. So what does it mean? There will be many attempts to answer that question today. Good luck to all who try, as there are multiple plausible responses.