Janet Napolitano, the governor of Arizona, is expected to be named US secretary of Homeland Security by the Obama administration.
She has called for a streamlined visa process, 'tamper-proof immigration documents' and an improved national employer verification system.
Immigrant rights organizations have planned a major march in Washington on 21 January, the day after Barack Obama is sworn in as the 44th US president.
According to US authorities, in the last year the government arrested and deported record numbers
of illegal immigrants whilst in the same period it naturalized a record number of new Americans.
Obama has voiced his support for US immigration reform in the past, both with regard to helping the growing Hispanic population and on the issue of increasing skilled immigration to help the U.S. economy maintain its global competitiveness.