Bera was first elected last year, and the National Republican Congressional Committee has already targeted his seat for 2014.
Bera echoed similar concerns.
"I worry that when the Affordable Care Act was originally passed, they did a very poor job of explaining it. ... I don't know that they're doing a much better job telling people about what the roll-out is going to look like," he told the Bee.
The healthcare law's biggest provisions — notably, new insurance exchanges in every state — are supposed to take effect Jan. 1 — just 11 months before the midterms. If premiums skyrocket, exchanges aren't ready on time or people don't sign up, Democrats could pay the price at the polls.
"We have one chance to get this right," Bera told the Bee's editorial board. "If this fails and blows up, it is probably another decade if not longer before health care and we don't have another decade."