This could be a problem (boldface mine):

The last thing Democrats want to contend with just a week before the 2016 presidential election is an outcry over double-digit insurance hikes as millions of Americans begin signing up for Obamacare.

But that looks increasingly likely as health plans socked by Obamacare losses look to regain their financial footing by raising rates.

Just a week after the nation’s largest insurer, UnitedHealth Group, pulled out of most Obamacare exchanges because it anticipates $650 million in losses this year, Aetna’s CEO said Thursday that his company expects to break even, but legislative fixes are needed to make the marketplace sustainable.

“I think a lot of insurance carriers expected red ink, but they didn’t expect this much red ink,” said Greg Scott, who oversees Deloitte’s health plans practice. “A number of carriers need double-digit increases.”

In some ways, the turmoil is not surprising: Under the health care law, plans are unable to choose who to insure, or how much to charge them based on their medical history. As a result, many plans enrolled a larger proportion of sicker people than they bargained for. But some of those losses were also a function of political wrangling after Republican lawmakers blocked payments that were supposed to help insurers get through the difficult first years.

The timing, though, is bad news for Democrats. Proposed rate hikes are just starting to dribble out, setting up a battle over health insurance costs in a tumultuous presidential election year that will decide the fate of Obamacare.

And the headlines are likely to keep coming right up to Election Day since many consumers won’t see actual rates until the insurance marketplaces open Nov. 1 — a week before they go to the polls.

“Any reports of premium increases will immediately become talking points on the campaign trail,” said Larry Levitt, senior vice president for special initiatives at the nonprofit Kaiser Family Foundation. “We’re in an election where the very future of the law will be debated.”