In 2024, Republicans retained control of the US House of Representatives.
Republicans won 220 seats, and Democrats won 215 seats.
The House of Representatives represented a small silver lining for Democrats, because they managed to gain two more seats in the chamber than they won in 2022.
The small size of Republican House majority will make it harder for Republicans to pass legislation than if they had more votes to spare.
Closest Races
It’s time to break out the tables.
Our first table examines the 11 House races that were decided by less than 2% in 2024.
The table describes the margins of victory by both percent of total votes cast and by the number of votes.
The symbol “(i)” represents the incumbent candidate in an election.
You can click on any table or graph in this series to view a larger version.
I originally obtained many of the election results that appear in this series from the New York Times.
I have done my best to double and triple check all of the statistics in this series, but if you notice I made a mistake, let me know.
Our next table table provides additional information about the 11 races shown above.
This table includes the 2022 margin in these districts, whether the district flipped, and whether the 2024 election was a rematch between the same candidates who ran against each other in 2022.
This table also lists whether the result in the district shifted in favor of Democrats or Republicans in 2024, and by how much.
Six of these districts shifted in favor of Republicans in 2024, and five shifted in favor of Democrats.
The tipping point district for House control was Pennsylvania 7, where Republican challenger Ryan Mackenzie defeated Democratic Incumbent Susan Wild by 1.0%.
If Democrats had managed to win Iowa 1, Colorado 8, and Pennsylvania 7, they would have won 218 seats and secured House control.
This table examines the 2024 results in the House districts that were the closest races in 2022.
A total of 11 races were decided in 2022 by less than 1%.
Six of these districts shifted in favor of Republicans in 2024, and five shifted in favor of Democrats.
Two districts had races that were among the 11 closest House elections in both 2022 and 2024.
In California 13, Democrat Adam Gray won a rematch in 2024 against Republican incumbent John Duarte.
In both 2024 and 2022, the winner of the election was decided by less than 1%.
In Colorado 8, Republican challenger Gabe Evans defeated Democratic incumbent Yadira Caraveo in 2024.
In both 2024 and 2022, the district was decided by less than 1%.
Historical Context
Now let’s explore how this House majority compares to others in recent American history.
This table lists the seats controlled by Democrats, Republicans, and Independents after each election since 1990.
I compiled this table using data from Wikipedia, which I believe is a reasonably reliable source for these kinds of statistics.
Republicans have the narrowest House majority of either party since 1990.
Since 1990, Republicans won a House majority after 12 elections, Democrats won a House majority after six elections.
Republicans won House control twice as often as Democrats during this period.
Let’s view this information on a line graph.
This graph shows the outcome of House elections beginning in 2006.
Immediately, you can see how narrow the majorities have been in the US House in the last three elections, compared to previous years.
Now, let’s zoom out to view all of the elections since 1990.
Recent House majorities look even smaller on this graph.
I created these line graphs using Flourish, a website that allows users to create compelling visual aids.
CNN has published a good article about the political dynamics in the current narrow House majority, and the history of narrow House majorities from the early Twentieth Century.
In the next article, we’ll examine the results of the 2024 US Senate elections.