Nielsen praises 'steady force' No. 2 Claire Grady, who is leaving Wednesday
                                
                                
                                    (Newser) -
                                    Wednesday is Kirstjen Nielsen's  final day as Homeland Security chief —and her second-in-command will be leaving with her. Nielsen, whose abrupt departure comes as part of a wider shakeup of immigration officials,  tweeted  Tuesday night that Acting Deputy Secretary Claire Grady has handed in her resignation, effective Wednesday,...