WASHINGTON  Seven months after taking office, Attorney General Eric H. Holder Jr. is reshaping the Justice Department’s Civil Rights Division by pushing it back into some of the most important areas of American political life, including voting rights, housing, employment, bank lending practices and redistricting after the 2010 census.

As part of this shift, the Obama administration is planning a major revival of high-impact civil rights enforcement against policies, in areas ranging from housing to hiring, where statistics show that minorities fare disproportionately poorly. President George W. Bush’s appointees had discouraged such tactics, preferring to focus on individual cases in which there is evidence of intentional discrimination.

To bolster a unit that has been battered by heavy turnover and a scandal over politically tinged hiring under the Bush administration, the Obama White House has also proposed a hiring spree that would swell the ranks of several hundred civil rights lawyers with more than 50 additional lawyers, a significant increase for a relatively small but powerful division of the government.

The division is “getting back to doing what it has traditionally done,” Mr. Holder said in an interview. “But it’s really only a start. I think the wounds that were inflicted on this division were deep, and it will take some time for them to fully heal.”