The Article 50 Brexit letter: Read it in full here #BrexitDay https://t.co/b1A4T63ed2

— The Telegraph (@Telegraph) March 29, 2017

Donald Tusk: 'There is no reason to pretend that this is a happy day, either in Brussels or in London' pic.twitter.com/DT3Km9myKl

— RTÉ News (@rtenews) March 29, 2017

Brexit live blog — Donald Tusk responds to Theresa May's letter https://t.co/Wm2iNc3ii7 pic.twitter.com/cCL0kIRsq2

— POLITICOEurope (@POLITICOEurope) March 29, 2017

Britain has made 'Brexit' official. Here are 42 questions about it that need answering https://t.co/L7jn5XwbMK

— TIME (@TIME) March 29, 2017

Brexit: A timeline of how Britain will leave the European Union and what happens next https://t.co/Fzw01QVHtD pic.twitter.com/EwWMYDkU1M

— The Economist (@TheEconomist) March 29, 2017

The Brexit vote shocked the world. But the European Union, if still ailing and dysfunctional, is far from dead. https://t.co/cVjLVQcaDv

— The New York Times (@nytimes) March 29, 2017

"And that is why I have decided to accept an invitation to become Angela Merkel's cat" #Article50 pic.twitter.com/uYIQQm43Qt

— Unnamed Insider (@Unnamedinsider) March 29, 2017

The Article 50 notification letter has arrived in Brussels tonight. Tmw lunchtime the UK Rep will hand deliver it and the clock starts.

— Carl Dinnen (@carldinnen) March 28, 2017

Theresa May signs the Article 50 letter, as she prepares to trigger the start of the UK's formal withdrawal from the EU on Wednesday. pic.twitter.com/sUYrgRps8A

— PA Media (@PA) March 28, 2017

Wednesday's FT: "May signs historic Brexit letter and opens way for compromise" #bbcpapers (via @hendopolis) pic.twitter.com/HFq277Dxut

— BBC News (UK) (@BBCNews) March 28, 2017

Here's how Britain will serve the EU with divorce papers https://t.co/GrjesiwzO7 pic.twitter.com/8h3IoxTF3n

— Bloomberg UK (@BloombergUK) March 28, 2017

Awfully sorry Donegal. According to the Guardian, Theresa May's taking you out too! #Article50 pic.twitter.com/2Y5TUAszt5

— David Blevins (@skydavidblevins) March 28, 2017

The Guardian view on #Brexit: start by protecting #EU nationals https://t.co/XuORj0G5YC

— Diego Martinez Schütt (@diegomartsch) March 28, 2017

#Article50: The view from Northern Ireland https://t.co/VbHI2SP9Tx via @BBCNewsNI #brexit

— Justin Cartwright (@JustinCar1) March 28, 2017

David Lammy: London must be a city-state if hard Brexit goes ahead https://t.co/YZtfXiXVtz

— Kevin | كيفين‎ | ケビン | קווין | 凱文 | کوین (@Kevlo75) March 28, 2017

Nigel Farage: I will emigrate if Brexit is a disaster https://t.co/hhAilrcc6p

— The Independent (@Independent) March 28, 2017

Scottish Parliament backs bid for new independence referendum https://t.co/REz1ln7v3k pic.twitter.com/yC1rtWdGar

— NBC News (@NBCNews) March 28, 2017

If a Scottish vote in 2018 would be unfair, then the original Brexit vote was unfair https://t.co/pBwkXyGIg7

— The Economist (@TheEconomist) March 28, 2017

This morning:
U.K. "doesn't have much to sell" if it loses Scottish oil,-@Brexit#BrexitEvehttps://t.co/3Y1YL720jEpic.twitter.com/bI2TKH4dn9

— Bonnie Greer (@Bonn1eGreer) March 28, 2017

Theresa May: 'Look, I know you didn't vote for Brexit, but England did, so Scotland kindly shut up and get behind what England wants'

— Johnny (@JohnnyDundee) March 28, 2017

Interesting. From Theresa May's EU referendum campaign speech last year: "We might find it [Brexit] is fatal to union with Scotland". pic.twitter.com/zKAbxZzIQT

— Ashley Cowburn (@ashcowburn) March 28, 2017

Mitch McConnell guarantees Neil Gorsuch will be confirmed on April 7 https://t.co/inoD2FdnzL pic.twitter.com/js5eNwBBvO

— POLITICO (@politico) March 28, 2017

Yates testimony barred because of “presidential communication privilege”? That is "legal" terminology for cover-uphttps://t.co/j4omJoOyLR

— Richard W. Painter (@RWPUSA) March 28, 2017

#BREAKING: The House GOP just shut down a resolution demanding that Trump release 10 years of tax returns. https://t.co/NIKOOCenAJ pic.twitter.com/taScptpwAM

— Caroline Orr Bueno, Ph.D (@RVAwonk) March 28, 2017

Environmental groups slam Trump’s executive order https://t.co/z25umywjvV pic.twitter.com/cbqgi5legx

— Raw Story (@RawStory) March 28, 2017

Don't put it past President Bannon to plan a false flag terrorist attack to energize trump's stumbling "presidency." https://t.co/xWkGDAdt8e

— BrooklynDad_Defiant!☮️ (@mmpadellan) March 27, 2017

Seeing the race as a referendum on Trump's presidency, Democrats making effort to flip Tom Price's House seat https://t.co/TlxRh1bRQV pic.twitter.com/sHow7J6Fyn

— This Week (@ThisWeekABC) March 28, 2017

House votes to block Obama-era online privacy regulations https://t.co/emlY0f91pY pic.twitter.com/S4ScLED6YP

— Talking Points Memo (@TPM) March 28, 2017

Turkey's referendum on making Erdogan more powerful hangs on a knife edge https://t.co/BsFlABbgv7

— The Independent (@Independent) March 28, 2017

There's a "fair chance" U.S. airstrike played a role in civilian deaths in Mosul, top U.S. commander in Iraq says. https://t.co/8WZO2XlAuH pic.twitter.com/4GwnuoyZny

— ABC News (@ABC) March 28, 2017

Robots sent into Fukushima keep dying https://t.co/e01Y8eWrzp

— The Independent (@Independent) March 28, 2017

Canada plans to legalize weed in 2018, just in case you didn't want to move there already. https://t.co/CX5Xnfkz07 pic.twitter.com/Y7St9TaIAv

— Mic (@mic) March 28, 2017

Elon Musk wants to plant computers in human brains to prevent an AI uprising https://t.co/FIRIE6MnDI

— The Independent (@Independent) March 28, 2017