In a 55-page opinion, U.S. District Judge Reed O'Connor ruled Friday that last year's tax cut bill knocked the constitutional foundation from under "Obamacare" by eliminating a penalty for not having coverage.
Supporters of the law immediately said they would appeal.
Wow, but not surprisingly, ObamaCare was just ruled UNCONSTITUTIONAL by a highly respected judge in Texas. Great news for America!— Donald J. Trump (@realDonaldTrump) December 15, 2018
The White House applauded O'Connor's ruling, but said the law remains in place while appeals proceed. President Donald Trump tweeted that Congress should pass a new law.
Twenty Republican-led states brought the lawsuit. After Trump ordered the Justice Department to stop defending the health law, a coalition of ACA-supporting states took up the defense.
O'Connor is a conservative Republican appointee who previously blocked other Obama-era policies.