Another loss for Trump, and another case they'll take to the Supreme Court

A federal appeals court in California on Friday ruled that the Trump administration’s use of Pentagon funding to build a wall along the U.S.-Mexico border is illegal. In a 2-1 ruling, the 9th Circuit Court of Appeals found that President Trump’s diversion of defense, military and other funding — billions of dollars that were not originally earmarked for border wall construction — violated the Appropriations Clause of the Constitution, which gives Congress the exclusive power of the purse.

"These funds were appropriated for other purposes, and the transfer amounted to ‘drawing funds from the Treasury without authorization by statute and thus violating the Appropriations Clause,’ ” the majority wrote. “Therefore, the transfer of funds here was unlawful.”

[...]

The court issued two related rulings on Friday, siding with California and more than a dozen states in one case, and private groups in another, all of whom challenged the administration’s move.

[...]

The practical effect of the ruling was not entirely clear because the Supreme Court last July ruled 5-4 that Trump could begin spending $2.5 billion in reallocated Pentagon funds to build the border wall while the legal challenges proceeded through the courts.

  The Hill

The Supreme Court will have to revisit it now, that's the effect.

...but hey, do what you want...you will anyway.