While acknowledging that the recession makes the political battle more difficult, President Obama plans to begin addressing the country’s immigration system this year, including looking for a path for illegal immigrants to become legal, a senior administration official said on Wednesday.

Mr. Obama will frame the new effort — likely to rouse passions on all sides of the highly divisive issue — as “policy reform that controls immigration and makes it an orderly system,” said the official, Cecilia Muñoz, deputy assistant to the president and director of intergovernmental affairs in the White House.