"It's reckless for Republicans to make Congress vote on this mess of a plan before we have those answers from the CBO," Schumer said.

Both the Energy and Commerce and Ways and Means committees are marking up their replacement proposal on Wednesday — before the Congressional Budget Office (CBO) examines its costs.

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Schumer argued that Republicans are rushing the replacement proposal — which Democrats have termed "TrumpCare" — because they believe the CBO score will make it harder for lawmakers to support the legislation.