House Minority Leader Nancy Pelosi of Calif. meets with reporters on Capitol Hill in Washington, Thursday, Jan. 9, 2014. The top Democrat in the Republican-controlled House focused on the Affordable Care Act and the fight to pass immigration reform. (AP Photo/J. Scott Applewhite)

President Barack Obama's health care law is back in Republican crosshairs as the GOP-led House weighs a bill that would impose new requirements on the administration.

Despite White House opposition, the House was expected to approve the measure Friday as emboldened Republicans kick off an election-year challenge to the troubled 4-year-old law. The GOP's focus on "Obamacare" reflects the party's belief that the well-known problems with the will pay political dividends in November's midterm contests.

The HealthCare.com enrollment website got off to a calamitous start on Oct. 1, followed quickly by widespread reports of canceled policies and higher premiums.

The House bill would require the administration to notify an individual within two business days of any involving personal data provided to the government during health care enrollment.