Report comes as Trump prepares to dismantle the plan

Fourteen million Americans would lose medical insurance by next year under a Republican plan to dismantle Obamacare that would also reduce the budget deficit, a non-partisan congressional research office said on Monday, throwing U.S. President Donald Trump and Republicans on the defensive as they press forward with replacement legislation.

The U.S. Congressional Budget Office (CBO) forecast that 24 million more people would be uninsured in 2026 if the plan being considered by the House of Representatives to replace the 2010 Affordable Care Act were to be adopted. Obamacare, as President Barack Obama’s signature piece of domestic policy is commonly called, expanded insurance to about 20 million Americans.

Hearing postponed

Hours after the CBO report was released, the House Budget Committee postponed its consideration of the Republican Bill to Thursday from Wednesday. Prior to the report, Republicans had been planning to vote soon on the Bill in the House, where it is likely to pass, and send it to the Senate, where its outlook is uncertain. The CBO projected that 52 million people would be uninsured by 2026 if the Bill became law, compared with 28 million who would not have coverage that year if the law remained unchanged.

Two House of Representatives committees have approved the legislation to dismantle Obamacare that was unveiled by Republican leaders a week ago, but it faces opposition from not only Democrats but also medical providers including doctors and hospitals and many conservatives. The CBO report’s findings could make the Republican plan a harder sell for lawmakers, particularly in the U.S. Senate. The CBO, however, said federal deficits would fall by $337 billion between 2017 and 2026 under the Republican Bill.

The Affordable Care Act aimed to help restrain U.S. healthcare spending, which is about 17% of the nation’s economy, but it has continued to grow faster than inflation.