From the day Senator Tom Harkin announced plans to retire, I had a bad feeling about Iowa Democrats defending an open U.S. Senate seat in a midterm year when Governor Terry Branstad would be on the ballot. Harkin may not have known other retirements would hand several Senate seats to Republicans practically before the campaigns began. He couldn’t have anticipated that issues like ISIS terrorism and the ebola outbreak would dominate the media discourse during the last two months of the campaign. He probably didn’t expect tens of millions of dollars to come into Iowa, amplifying Bruce Braley’s every misstep (plus a bunch of made-up stuff) thousands of times.

I appreciate Harkin’s many years of service in Congress and don’t mean to begrudge him time with his family. But the bottom line is that if he had sought a sixth term, Republicans would not have fielded a serious Senate candidate in Iowa. Harkin would have cruised against a challenger on the “clown car” level of Christopher Reed.

In the coming days and weeks, plenty of Iowa Democrats will rail against tactical or strategic errors by Braley and his strategists. They’ll have a point, but in a year like this, none of it mattered. Candidates who started their campaigns in a stronger position and ran better races (such as Senator Kay Hagan in North Carolina or independent Greg Orman in Kansas) had the same result. Almost every competitive Senate race shifted toward the Republican at the end. Good grief, Senator Mark Warner nearly lost Virginia, which wasn’t even on the radar as a potential GOP pickup.

Instead of running for an open Senate seat in 2020 (a presidential election year), Iowa Democrats will have to find a candidate who can compete with the better-known and better-financed incumbent Senator Joni Ernst.