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Congressional Data Challenge

We are pleased to announce the winners of the Congressional Data Challenge!

Published April 2018

A variety of legislative data is available on the website (for some examples, see our LC for Robots page). We sponsored this legislative data challenge to advance the discovery, use, and exploration of the collection of legislative information the Library offers to the nation and the world through the website Submissions were evaluated based on creativity, usefulness, and design. Entries were judged by a four-person panel, composed of experts in data visualization, application development, the U.S. Congress and congressional data. Click on the "Data and Details" button to view challenge rules and all publicly-submitted solutions.

$5,000 First Prize Solution: U.S. Treaties Explorer by Alan Gomez-Tagle and Carter Nielsen

With this data visualization tool, you can explore trends in U.S. treaties across time and topic, by type, and by country. Explore individual treaties by hovering over each treaty circle, which opens a popover with additional information, including a link to the treaty page on

View U.S. Treaties Explorer External

$1,000 Best High School Project Solution: Dealmaker by Daniel Vebman

Dealmaker is an iOS application that visualizes relationships between current legislators by region, party, and individuals.

Download the Dealmaker app External

Honorable Mention Solution: Members by Interest by Ed Sperr

This visualization tool lets you browse types of bills an individual member sponsors and cosponsors. View a ranked list of members by subject, or view an individual member to see the distribution of topics with which they engage.

View Members by Interest External


First and foremost thanks to all who applied! Additional thanks to all of those who helped shape this contest, especially NEH following its successful Chronicling America Data challenge; the United States Government Publishing Office Federal Digital System / govinfo team; and the Internet Education Foundation, coordinator of the Congressional App Challenge.

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