Now, comes the sell.

Hours after Congress sent a sweeping package of tax cuts to the White House for President Donald Trump’s signature, the powerful network of advocacy groups backed by billionaires Charles and David Koch went into high gear to turn around the bill’s dour poll numbers. Planned to last at least six months—heading right into the months when voters will turn their attention to the 2018 midterm elections—the multi-platform Koch-backed campaign will seek to explain the benefits of the tax package.

“Given that the tax reform bill was just finalized, there’s a lot of work to be done educating Americans about its benefits,” said James Davis, an executive vice president at Freedom Partners, the hub that coordinates Koch-backed political activities. “We will make a massive push to show how pro-growth policies can revitalize the economy and open the floodgates to new opportunity, innovation and prosperity.”

The sales job will be tough. Polls find the proposal incredibly unpopular with voters: a CNN poll released this week found 55% of voters opposed to the bill. And for good reason. The bulk of the benefits will go to those who make more than $300,000 a year, according to the non-partisan Tax Policy Center. And, by 2027, those earning less than $75,000 annual will see a tax hike while the cuts for the ultra-rich remain, according to the Center for Budget and Policy Priorities.

Democrats, who stood unified against the package, now plan to weaponize it against Republicans next year and beyond.

Republicans grumble that they had little choice but to pass this unpopular bill. For years, they’ve promised sweeping tax cuts. Now, given control of the House, the Senate and the White House, they delivered on campaign rhetoric in a big way. Failing to do so would have meant they had control of all levers of official Washington power…