In an odd twist, low-income people in about half of U.S. counties will now be able to get a taxpayer-subsidized "Obamacare" policy for free, according to a new study that suggests some actions by President Donald Trump against the health law could backfire.

Alexander said on Wednesday Trump had "completely engineered" the bipartisan proposal but the president backed away from support he had expressed a day earlier.

Senators reached a breakthrough deal Tuesday on resuming federal payments to health insurers that President Donald Trump has blocked.