The Supreme Court will weigh Trump's birthright citizenship order this week. Here's what to know about the case.

Key Points:

• The Supreme Court is set to hear arguments on President Trump's executive order aimed at ending birthright citizenship, challenging the interpretation of the 14th Amendment's Citizenship Clause and related federal law.
• Trump's order denies citizenship to children born in the U.S. to parents who are unlawfully present or temporarily in the country, a policy currently blocked by lower courts and subject to legal challenges.
• The Trump administration argues that birthright citizenship should be limited to children of parents "completely subject" to U.S. jurisdiction, citing concerns about illegal immigration and "birth tourism," while opponents maintain that the 14th Amendment guarantees citizenship regardless of parents' status.
• The case revisits the century-old precedent set by United States v. Wong Kim Ark, which affirmed citizenship for nearly all children born on U.S. soil, and could have far-reaching implications for millions of current and future U.S.-born citizens.
• If the Supreme Court upholds the order, it would mark a significant shift in constitutional interpretation and immigration policy, potentially stripping citizenship from many Americans born to undocumented or temporary residents, with broad social and legal consequences.