Donald Trump announced on Friday that he would be declaring a national emergency to bypass Congress and build $8 billion in barriers on the border, a big step toward his long-desired wall along the southern border.

Trump’s move, announced in a rambling, improvised address from the Rose Garden, will launch a fierce constitutional battle in the courts with lawmakers and outside groups opposed to his decision — which did win the public backing this week of Senate Majority Leader Mitch McConnell.

Trump is separately set to sign legislation approved by Congress that funds the government and prevents a new shutdown set to begin on Saturday.

But that legislation fell far short of his demands for $5.7 billion in wall funding.

Trump plans to redirect $3.6 billion in military construction funding toward the border project. Trump will also take separate executive action repurposing about $2.5 billion from the Defense Department’s drug-interdiction program and $600 million from the Treasury Department’s asset-forfeiture fund.

Trump railed about a bunch of different topics…China, the economy, and of course the wall.

Then when discussing how his travel ban faced a bunch of legal battles, Trump started to basically sing about it.

Seriously.

Trump's sing-songy recounting of the legal process is remarkable.

— Jonathan Lemire (@JonLemire) February 15, 2019

WATCH:

In a bizarre sing-song cadence, Trump acknowledges that his national emergency will face legal challenges, but expresses hope that SCOTUS will eventually rule in his favor. pic.twitter.com/F4DCzKrsns

— Aaron Rupar (@atrupar) February 15, 2019

Twitter had a field day:

Oh good, a sing-song voice.

Meanwhile, Red Hats and transactional Trump-curious Republicans are APOPLECTIC that the Deep State was hatching a COUP PLOT YOU GUYS! when they mulled invoking the 25th Amendment. https://t.co/RY6rQYB1jr

— CLA (@ConservativeLA) February 15, 2019

I got as far as the f'n weird sing-song court thing. If this isn't Trump's version of drunk history, I don't know what is. Had to shut that off. No wonder I don't listen to him. He's as horrible as he has always been since the 80's. Who voted for that guy?#NationalEmergency

— zelda laflame (@zeldalaflame) February 15, 2019

Trump should go on the Voice. That sing-song riff about how the court system works was Grammy worthy

— Emily C. Singer (@CahnEmily) February 15, 2019

Trump's sustained sing-song description of the appeals process is beyond belief.

— michael tarbox (@michaeltarbox) February 15, 2019