According to Politico Pro [$]:

More than $860 million of President Barack Obama’s proposed $1 billion increase in the CMS budget will go to building the federal exchange, acting [Centers for Medicare and Medicaid Services] Administrator Marilyn Tavenner said during a budget briefing at HHS on Monday.

This funding is necessary in part because the amount originally appropriated for the federal costs of implementing the Affordable Care Act — $1 billion — is expected to be gone by the end of this year, HHS officials said.

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