The Trump administration is imploring the Supreme Court to show "extraordinary deference" to the president as commander-in-chief and affirm the lawfulness of his National Guard deployment to Illinois , arguing in a new court filing that federal agents conducting immigration enforcement are unable to do the work on their own. A letter from Solicitor General John Sauer to the justices on Monday addresses their request that both parties in the case explain the meaning of a key part of federal law governing when a president can send in troops. Section 12406 of the federal code says a president may call up the National Guard when he is "unable with the regular forces to execute the laws of the United States." The Supreme Court said it was interested in finding out what exactly the term "regular

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