Health and Human Services Secretary Kathleen Sebelius could face perjury charges over her congressional testimony on Obamacare, House Oversight and Government Reform Committee Chairman Darrell Issa, R-Calif., warned in a letter calling for Sebelius to correct the record.

“Witnesses who purposely give false or misleading testimony during a congressional hearing may be subject to criminal liability under Section 1001 of Title of 18 of the U.S. Code, which prohibits ‘knowingly and willfully’ making materially false statements to Congress,” Issa wrote in a Wednesday letter. “With that in mind, I write to request that you correct the record and to implore you to be truthful with the American public about matters related to Obamacare going forward.”