President Trump claimed over the weekend that his tweets qualified as “notification” to Congress of his war powers.

They don’t.

Posting something online doesn’t make it automatically true or legally actionable.

Just ask all the people who posted hoax privacy notifications for Instagram and Facebook.

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President Trump uses Twitter a lot. On December 12, for instance, he tweeted a record 112 times in one day. Trump uses Twitter to convey a range of emotions – from anger and rage at his impeachment inquiry, to unfettered glee at the failure of his opponents. But over the weekend, Trump used Twitter to inform Congress (and Iran) of his plans in the most distant-cousin-sending-you-an-email-chain-letter way possible.

“These Media Posts will serve as notification to the United States Congress that should Iran strike any U.S. person or target, the United States will quickly & fully strike back, & perhaps in a disproportionate manner. Such legal notice is not required, but is given nevertheless!” Trump tweeted from his Mar-a-Lago Club on Sunday afternoon.

(Of course, that’s not how any of this works, and on Saturday the White House sent a formal notification to Congress regarding the January 2 drone strike on Maj. Gen. Qassim Soleimani. The War Powers Act of 1973 dictates that the president must send official notification to Congress within 48 hours of a conflict abroad.)

Yale Law Professor Oona Hathaway took to Twitter on Saturday to explain exactly what’s wrong with the president’s claim – and why Twitter doesn’t count as “official.”

Second, he claims "[s]uch legal notice is not required." That's not true. Any time the president involves the armed forces into "hostilities," he must–at a minimum–notify Congress within 48 hours. 2/ — Oona Hathaway (@oonahathaway) January 5, 2020

Third, he is also obligated to "in every possible instance . . . consult with Congress before introducing United States Armed Forces into hostilities or into situation where imminent involvement in hostilities is clearly indicated by the circumstances . . ." under the WPR. 3/ — Oona Hathaway (@oonahathaway) January 5, 2020

As one Congressional aide told CNN, “The President has Article II authority to defend American assets/ personnel but this would seem to exceed that under traditional interpretations.”

But the president seems to believe that simply declaring something in a public forum makes it true. It’s a logic that’s duped people time and again to participate in hinky online hoaxes and scams.

Remember in 2015, for example, when everyone in your Facebook feed was posting some variation of the below statement:

Foto: Remember this?sourceFacebook

A similar privacy post regarding Instagram circulated in 2019.

Foto: How about this?sourceInstagram

To wit, that’s not how this works. That’s not how any of this works.

Still, Congress took to – what else? – Twitter to voice their concern over Trump’s use of the social media platform to declare war.

.@realDonaldTrump, this is Twitter. This is not where you wage unauthorized wars. https://t.co/247bvTfhvy — Rep. Mark Pocan (@repmarkpocan) January 5, 2020

OMG, Trump thinks a crazed Tweet satisfies his War Powers Act obligations to Congress. Our President has taken us to the brink of war and is now vamping with no plan and no clue. Please, someone in the GOP, take the car keys – read the 25th Amendment. https://t.co/aHmzlWwFca — Rep. Jared Huffman (@JaredHuffman) January 5, 2020

The House Foreign Affairs Committee then issued its own “Media Post.”

This Media Post will serve as a reminder that war powers reside in the Congress under the United States Constitution. And that you should read the War Powers Act. And that you’re not a dictator. https://t.co/VTroMegWv0 — House Foreign Affairs Committee (@HouseForeign) January 5, 2020

Three years into the Trump administration, the president is now using his favorite internet tool to try to wage war, and – legal or not – we have no choice but to take it seriously.