Over the ten weeks between Labor Day and Election Day, as Democrats and Republicans battle it out for control of the House, we're taking a look at 30 of the most competitive races in the 2018 midterm elections: Where are these key districts, and what are they like? Which member is trying to keep their job? Who wants to take it away? And for whom might generous donations of your valuable time and hard-earned money make the greatest difference, if you were so inclined to make them? Democrats need to win only 23 seats to earn the gavel for the next two years, and nothing terrifies Donald Trump and friends more than what they plan to do with it.

For more elections coverage, you can read part one of this series here, part two here, and part three here, and a complete guide to the 2018 Senate races here.

Iowa 1st: The most relatable candidates in America are the ones with student debt

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The district: Northeast Iowa, east of I-35: Waterloo, Dubuque, and Cedar Rapids, which you may remember as the setting for an underrated 2011 Ed Helms movie of the same name. It's very white (98 percent!). It twice went for Obama by healthy margins, but flipped in 2016, when Trump won it by 3.5 points.

The incumbent: Republican Rod Blum, a climate science skeptic and Freedom Caucus doofus who just became the subject of the world's worst-timed House Ethics Committee investigation. When his membership in a Facebook group in which members posted racist content (the group is named "Tea Party"—imagine that) recently came to light, an AP reporter reached out to his office to follow up. Rod Blum got really, really mad about it.

You may also remember Blum from this 2017 interview in which he responded to an interviewer's question about why he screens attendees at his town halls by tearing off his microphone and storming out of the room, leaving the bewildered kids he had assembled around him as props just kind of standing there.

The NERVE of these JOURNALISTS, to ASK QUESTIONS of an ELECTED OFFICIAL about MATTERS OF PUBLIC CONCERN!