who was the majority on birthright citizenship

The majority on birthright citizenship was the Supreme Court’s 6-3 majority ruling in favor of keeping birthright citizenship. Chief Justice John Roberts wrote the majority opinion, and the decision rejected Trump’s effort to limit automatic citizenship for most people born in the U.S.

What the majority said

The majority held that children born in the United States to parents who are unlawfully or temporarily present are still “subject to the jurisdiction” of the U.S. and therefore citizens at birth under the 14th Amendment.

What the dissent said

Three justices sided with the Trump administration and argued the Constitution does not clearly grant that right to every child born in the country.

In plain terms

So if you mean “who was in the majority,” it was the justices who upheld birthright citizenship, led by Roberts.