As members of the 114th Congress were sworn into office on Tuesday, their party affiliations described what happened last November: 246 of the 435 representatives and 54 of the 100 senators are Republican. That might be enough for some fellow GOP’ers to claim victory and a “mandate,” but they would be wise to recall a lesson from history. The last time the House had so many Republicans was in 1947, when the 80th Congress was sworn in.