Republicans investigate ObamaCare delay

The Treasury Department said those concerns prompted a delay in the mandate's reporting requirements and penalties.

House Republicans, while acknowledging that such criticism has been widespread, pressed the administration Wednesday to document all communication between administration officials and "individuals, companies or organizations" that related to the delay.

GOP lawmakers, in a letter to Health and Human Services Secretary Kathleen SebeliusKathleen SebeliusOPINION | 5 big ideas to halt America's opioid epidemic Aligning clinical and community resources improves health Sebelius on GOP healthcare plan: 'I'm not sure what the goal is here' MORE, also noted that administration officials have repeatedly said other parts of the law will be ready on time.

Sebelius and other officials have said new insurance marketplaces will be up and running as scheduled by Oct. 1. Although those assurances did not pertain to the employer mandate, Republicans have said one delay raises the possibility of larger problems with the implementation effort.