WASHINGTON —

The Pentagon announced Monday it is investigating Democratic Sen. Mark Kelly of Arizona over possible breaches of military law after the former Navy pilot joined a handful of other lawmakers in a video that called for troops to defy "illegal orders."

Previous coverage above: 'Punishable by death': President Trump accuses Democratic lawmakers of seditious behavior

The Pentagon’s statement, posted on social media, cited a federal law that allows retired service members to be recalled to active duty on orders of the defense secretary for possible court-martial or other measures.

It is extraordinary for the Pentagon, which until President Donald Trump's second term had usually gone out of its way to act and appear apolitical, to directly threaten a sitting member of Congress

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