The government does not track how often immigration agents grab citizens. So ProPublica did. Our tally — almost certainly incomplete — includes people who were held for days without a lawyer. And nearly 20 children, two of whom have cancer.

We compiled and reviewed every case we could find of agents holding citizens against their will, whether during immigration raids or protests. While the tally is almost certainly incomplete, we found more than 170 such incidents during the first nine months of President Donald Trump’s second administration.

Among the citizens detained are nearly 20 children, including two with cancer. That includes four who were held for weeks with their undocumented mother and without access to the family’s attorney until a congresswoman intervened.

Immigration agents do have authority to detain Americans in limited circumstances. Agents can hold people whom they reasonably suspect are in the country illegally. We found more than 50 Americans who were held after agents questioned their citizenship. They were almost all Latino.