The U.S. judge who temporarily blocked President Donald Trump’s administration from invoking wartime powers to deport migrants has for years handled high-stakes cases involving sensitive security or political issues - sometimes ruling in Trump's favor.

Federal judge James Boasberg is the target of an impeachment effort by President Trump and House Republicans after questioning the administration's decision to disregard an order.

The Trump administration has insisted it didn’t violate a judge’s written ruling—but he’s expressed skepticism.