A federal judge in New Hampshire said Thursday he’ll certify a class action lawsuit that includes all children who’ll be affected by President Trump’s executive order ending birthright citizenship and issue a preliminary injunction blocking it from taking effect. Here’s what you need to know about the birthright citizenship court ruling:

The federal court ruling

Bush-appointed judge blocks Trump order:

The legal standard

Court finds likelihood of success for challengers:

The appeals timeline

Government given window to challenge decision:

The ACLU victory

Civil liberties group celebrates ruling:

The Supreme Court context

High court ruling influenced class action strategy:

Justice Barrett’s guidance

Trump appointee provides legal pathway:

The ACLU legal strategy

Civil liberties group files suit hours after Supreme Court decision:

The constitutional challenge

Lawsuit targets order’s legality:

Read more:

• Judge blocks Trump’s birthright citizenship order, certifies class action

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