Supreme Court Justice Brett Kavanaugh launched a series of pointed questions at a Trump administration lawyer about the president’s plan to end birthright citizenship. The shockingly blunt approach during oral arguments Thursday signaled an apparent opposition to the administration’s arguments.

The Trump administration came to the Supreme Court on Thursday with what it called a “modest” request in its effort to end the constitutional right of birthright citizenship.

In a case involving changes to birthright citizenship, the justices heard arguments on whether a single federal judge in a single district can block Trump administration policy across the country.