With the midterm election less than two weeks away, the dialysis industry has made Proposition 8 the most expensive on the California ballot this year — and has broken the record for spending by one side on any statewide ballot measure.

It’s been a year of playing defense for DaVita Inc., one of the country’s largest dialysis providers.

The health-care industry has given $46.7 million to candidates in the midterm elections this year, according to the Center for Responsive Politics, pouring money into a tightly fought battle between Democrats and Republicans over control of Congress.

At a time of mounting national anger about rising health care prices, the country’s largest union of health workers has sponsored ballot measures in two San Francisco Bay Area cities that would limit how much hospitals and doctors can charge for patient care.

People will no longer face a tax penalty if they choose not to purchase health insurance starting next year, but those who do will find slightly lower rates on Nevada’s Obamacare exchange.

Nevada’s health insurance marketplace is warning millennials that it’s costly to be uninsured as it prepares for its sixth open enrollment period.