President Obama will announce his intention to nominate Julian Castro as defense secretary . The nomination is expected Friday afternoon , a spokesman says . Castro is the mayor of San Antonio . If selected for the job , Castro replaces Shaun Donovan .
President Obama will announce his plan to nominate Julian Castro as HUD secretary . The announcement is expected Friday afternoon , a source says . Castro is the mayor of San Antonio . If confirmed for the job , Castro replaces Shaun Donovan .