In Texas, a federal court has declared the Affordable Care Act unconstitutional, setting up a likely challenge to President Obama’s signature healthcare law at the Supreme Court. Federal District Court Judge Reed O’Connor—a George W. Bush nominee—ruled Friday that the ACA’s individual health insurance mandate violates the Constitution, which invalidates the entire law, he said. Speaking at a congressional ball Saturday night, President Trump hailed the ruling.

President Donald Trump “I believe we’re going to get really good healthcare. Exciting things happened over the last 24 hours.”

The ruling is a victory for the 18 Republican state attorneys general and two Republican governors who are challenging the ACA, but the law will remain in effect as the ruling is appealed.