FILE PHOTO - U.S. Homeland Security official Claire Grady attends a news conference during a meeting of the Interior ministers of G7 nations in Paris, France, April 5, 2019. REUTERS/Charles PlatiauWASHINGTON (Reuters) - U.S. Homeland Security Secretary Kirstjen Nielsen said on Tuesday that Claire Grady, the acting deputy secretary of the department, had offered her…