Consumer Reports says medical bills had been a leading cause of personal bankruptcy before health insurance expanded under the ACA.

Since 2010, personal bankruptcy filings have dropped by about 50-percent. Experts say some of that is due to an improved economy and laws passed in 2005 that make it harder to declare bankruptcy. But nearly all the experts Consumer Reports interviewed also point to expanded health insurance as a major driver of the decline.

As the Senate works on its plan to repeal and replace the Affordable Care Act, Katie Weber is paying close attention.

"I don't know how many MRIs I've had, but in the dozens for sure," said Weber.

The 29-year old is fighting cancer. She says her expensive treatments would have bankrupted her had it not been for the financial protections of the ACA.