House Panel Continues Scrutiny of Affordable Care Act-ap: CMS Administrator Marilyn Tavenner and MIT economist Jonathan Gruber, who advised the administration on the creation of the ACA and has drawn controversy with recent comments critical of the law, will testify at a 9:30 a.m. hearing before the House Oversight and Government Reform Committee. Outgoing Chairman Darrell Issa, R-Calif., will lead the questioning at the hearing, which could offer red meat for partisans, but is unlikely to alter policy.