The recent announcement by James Sensenbrenner (R-Wis.) that he would not seek re-election in 2020 sparked new worries among the GOP that retaking the House in 2020 might be nearly impossible. Although Sensenbrenner's district should be "safe" (as should about half of the more than a dozen seats in districts where Republicans are retiring), it never helps to lose an incumbent. That said, in 2020, the control of the House may be well near irrelevant. Over time, the House has had one major constitutional duty: the budget. All spending and taxation bills must originate in the House. But in all...