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We now know precisely how devastating Obamacare repeal could be.

The Congressional Budget Office reports that, without a replacement, repealing the Affordable Care Act will leave 18 million more Americans without health insurance within a year. “Later, after the elimination of the ACA’s expansion of Medicaid eligibility and of subsidies for insurance purchased through the ACA marketplaces, that number would increase to 27 million, and then to 32 million in 2026,” according to the nonpartisan federal agency.

In addition, the CBO found premiums would increase by 20 to 25 percent within a year: “The increase would reach about 50 percent in the year following the elimination of the Medicaid expansion and the marketplace subsidies, and premiums would about double by 2026.”

Republicans, of course, are promising to repeal and replace Obamacare, giving Americans “lower costs and more choices.”

All they’re lacking is an actual plan to make that happen.