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President-Elect Joe Biden’s nominee to run the Department of Homeland Security told a Senate panel on Tuesday that if he is confirmed as secretary, he will closely examine breach by Russian actors of some federal networks to see whether programs designed to defend against these hacks work as intended and whether additional defenses are needed. Alejandro Mayorkas said he would “avail” himself to latest intelligence about the hack, which U.S. government security agencies believe was likely backed by Russia, to…
