President Trump is preparing to nominate federal appeals court Judge Amy Coney Barrett of Indiana, a favorite of both the social conservative base and Republican elected officials, to succeed Justice Ruth Bader Ginsburg, Republican sources tell Axios.

Why it matters: If confirmed, Barrett — just 48 years old — would move the court notably to the right, perhaps for a generation.

Trump's decision has been closely held, and as with any presidential decision subject to last minute change.

• But the machinery around the president is preparing for a Barrett “rollout” after he announces his pick, scheduled for Saturday at 5 p.m.

Axios’ Jonathan Swan reported back in March 2019 that Trump had his eye on Barrett, telling confidants he was “saving her for Ginsburg” when her name came up during deliberations over replacing Justice Anthony Kennedy, who retired.