Who is Mark Kelly, the senator the Pentagon is targeting for urging troops to defy illegal orders?

The Pentagon announced it is investigating Democratic Senator Mark Kelly of Arizona over possible breaches of military law.
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Democratic Senator Mark Kelly Faces Pentagon Investigation Over Trump Order Refusal Call

The U.S. Department of Defense has launched an investigation into Democratic Senator Mark Kelly, 61, who urged military personnel and intelligence officers to refuse “illegal orders” from U.S.

Who is Mark Kelly, Senate Democrat targeted over ‘illegal orders’ video?

Sen. Mark Kelly (D-Ariz.) has become entangled in a rapidly escalating fight with the Trump administration this week over a video in which he and five other Democratic lawmakers advised military ...