Kate Masur

@katemasur.bsky.social

Historian and whatnot. Recently published FREEDOM WAS IN SIGHT! A GRAPHIC HISTORY OF RECONSTRUCTION IN THE WASHINGTON, D.C. REGION, with illustrations by the remarkable Liz Clarke. See also katemasur.com.

In @slate.com, Reva Siegel examines how SCOTUS's birthright citizenship opinion shows how people outside the courts have long shaped the Constitution. She spotlights a key development: for the first time, the Court recognized Frederick Douglass as a framer. Historians helped the Court get there 🧵⬇️

The Supreme Court’s Biggest Case of the Term Shows Popular Constitutionalism in Action

The birthright citizenship case the Supreme Court just decided demonstrates how deep-rooted this practice is.

slate.com

SCOTUS opinions can be baffling and inaccessible, but if there is something, anything people should read about birthright citizenship, it is the amicus brief of Martha S. Jones & Kate Masur. If it doesn't make you believe in the power of change & the good possible in the Constitution, nothing will.

supremecourt.gov

With so many others I'm relieved that SCOTUS upheld birthright citizenship. And yes, it shouldn't have been this close. Please, everyone, read Justice Jackson, who gives a particularly forthright account of the relevant history and emphasizes the stakes for this country.

With so many others I'm relieved that SCOTUS upheld birthright citizenship. And yes, it shouldn't have been this close. Please, everyone, read Justice Jackson, who gives a particularly forthright account of the relevant history and emphasizes the stakes for this country.

For more from @katemasur.bsky.social and @marthasjones.bsky.social, check out their brief, detailing the long struggle for a broad and inclusive guarantee of birthright citizenship undertaken by free Black Americans before the Civil War. The Constitution instantiates that guarantee.

Kate Masur @katemasur.bsky.social · 4mo ago

Trump is flat wrong when he claims that birthright citizenship was intended only for the "babies of slaves." Martha Jones and I have the receipts. www.nytimes.com/2026/03/30/o...