Harkin, who serves as chairman of the Senate Health, Education, Labor and Pensions Committee, said nearly 5 million people visited healthcare.gov within the first 24 hours of it launching Tuesday.
Lawmakers also failed to reach a deal Tuesday to keep the government funded — Harkin blamed that on Republicans.
“Republican still want to hold the government hostage and defund the Affordable Care Act,” Harkin said. “Republicans are still trying to stop [ObamaCare].”
House Republicans have tried to attach riders to defund and delay ObamaCare, but Senate Democrats have said they will only accept a “clean” CR.
It's unclear where the fight will go from here, with both sides digging in for the first government shutdown since 1996.