Baucus, the chairman of the chamber’s powerful Finance Committee and a key architect of the healthcare reform law, said he fears people do not understand how the law will work.

“I just see a huge train wreck coming down,” he told Health and Human Services Secretary Kathleen Sebelius at a Wednesday hearing. “You and I have discussed this many times, and I don’t see any results yet.” …

“I’m very concerned that not enough is being done so far — very concerned,” Baucus said.