The president said mothers have "credibility" in selling his healthcare law.
The lawmakers are calling on the FTC to investigate firms' marketing practices.
Consumers who select health plans by Dec. 23 now have until Jan. 10 to pay their premiums.
Alexander Bolton and Bob Cusack 12/18/13 01:19 PM EST
“I think for sure it will be a net positive,” said Reid.
Uninsured Americans are wary of the healthcare law as enrollment continues.
Teenagers' opposition to the drug has dropped in recent years.
The Democratic senator expressed frustration with the implementation of HealthCare.gov.
"We didn't fly across the country for a discussion on HealthCare.gov," a source told CNN.
Elijah Cummings charged Darrell Issa with "cherry-picking" evidence on HealthCare.gov.
Issa said findings indicate the online ObamaCare portal was vulnerable to attackers.