She delivered an emotional statement outside Number 10, in which she said that the job of Prime Minister had been the "honour of her life to hold."
Conservative Brexiteers who previously backed the deal are now saying they're going to vote against it.
Advocacy group Hope Not Hate has polling data that shows young people could decide Robinson's fate at the ballot box — but only if they turn out to vote.
UKIP Candidate Carl Benjamin Has Talked Again About Raping Labour MP Jess Phillips And Now She Wants Action
"If Facebook and Twitter can ban these people for hate speech, how is it they are allowed to stand for election?" Phillips told BuzzFeed News.
"Theresa May should not be rolling out the red carpet for a state visit to honour a President who rips up vital international treaties, backs climate change denial and uses racist and misogynist rhetoric," Corbyn said.
"It is deeply disappointing to see a Liberal Democrat council candidate resort to such crass bigotry and denial about Islamophobia," a spokesperson from the Muslim Council of Britain said.
Exclusive: Party leader Vince Cable had personally pledged to address the Liberal Democrats' "complacency" over diversity.
"I've always been clear that we could make a success of no deal in the long term, but leaving with a deal is the best solution," May said.
After MPs rejected all the alternative proposals for the second time in a week, a leading Conservative MP announced he was quitting the party because it “refuses to compromise”.
On the day that Britain had initially been scheduled to leave the European Union, the deal was voted down by 58 votes, deepening Britain's political crisis.
They include a senior party official who was criticised for blocking a recommendation from staff to suspend a member accused of anti-Semitism.
May told Conservative MPs: "I am prepared to leave this job earlier than I intended in order to do what is right for our country and our party."
MPs Will Vote On Alternative Brexit Plans On Wednesday — But Theresa May Says She Won’t Be Bound By The Result
Parliament will now consider alternative options that could include no-deal, a second referendum, a softer Brexit and cancelling the whole thing.
"May’s rhetoric was something straight out of the Breitbart playbook," one MP told BuzzFeed News.
After Streatham MP Chuka Umunna quit the party for the Independent Group, Labour has just three black male MPs. Their next candidate could be selected from a shortlist of women.
Campaigners And MPs Are Furious That The Government Won't Ensure All Pupils Receive Lessons On LGBT Relationships
More than 50 Labour MPs and peers had written to the education secretary saying the lessons were "critical to protecting children who may be in abusive homes".
Bercow's decision, based on a 415-year-old precedent, sets up a major constitutional clash between Parliament and the government. A new, "fundamentally different" deal would have to be negotiated for another vote to be allowed, the speaker said.
Brexit will be delayed until June 30 if MPs can agree a deal by the end of March, or potentially for much longer if they can't.
The government hopes Labour MPs will help Theresa May to get her deal through eventually, but Labour MPs in Leave-voting constituencies told BuzzFeed News they won't be backing it.