Sen. Mark Kelly, D-Ariz., filed a lawsuit Monday against Defense Secretary Pete Hegseth and the Pentagon, charging their effort to censure and demote him is “unlawful and unconstitutional.”Hegseth said last week that the Pentagon was taking steps to downgrade Kelly’s military retirement rank and pay because of his “seditious statements” — a reference to a video he and other retired service members released that urged members of the military not to comply with illegal orders