"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.
He said the GOP will make demands in exchange for increasing the debt ceiling this spring.
Two of the companies hired by the government to implement the healthcare law are among the most penalized federal contractors for labor law infractions, according to a report from Senate Democrats.
The study, released last week by...
Kurt DelBene, a former Microsoft executive, will soon take the reins at HealthCare.gov.
Nine House Democrats have offered legislation that would eliminate grants to states.
GlaxoSmithKline will also stop compensating salespeople based on the number of prescriptions doctors write for its products.
The GOP lawmaker said Sebelius should be investigated for obstructing a subpoena.
At least 25.4 million seniors received a free preventive service so far in 2013, according to HHS.