All but overlooked in the Republican Senate landslide is the double-digit loss of seats for Democrats in the House. The outcome casts a cloud on House Minority Leader Nancy Pelosi’s future, potentially throwing the House out of reach for Democrats in 2016 and dashing Pelosi's dream of serving as House speaker with a President Hillary Rodham Clinton. Democrats lost at least 14 seats Tuesday. Because gerrymandering has reduced the number of competitive House districts to roughly 50, or barely 10 percent of the 435 seats, the climb back for Democrats is going to be monumentally steep. Republicans now hold their...