Timothy-a combative character who one former colleague said had helped create a "toxic" atmosphere at the heart of the government-said he took responsibility for the Conservative manifesto, including a plan for elderly social care that caused a backlash.
Downing Street initially said on Saturday that an outline agreement on a "confidence and supply" arrangement had been reached with the DUP which would be put to the Cabinet for discussion on Monday. "May fights to remain PM", said the front page of the Daily Telegraph, while the Times of London said: "May stares into the abyss".
Davidson, who is gay and set to marry an Irish catholic later this year, subsequently said she had received "categoric assurances" from Downing Street that any deal would not affect LGBTI rights. "That's not a matter for me", she said.
Several newspapers said Foreign Secretary Boris Johnson was being urged by supporters to launch a leadership challenge, but he dismissed the reports as "tripe" in a tweet saying he was backing May.
"I sought, and to be fair to the prime minister, received a categoric assurance that in talking to the DUP that there would be no suggestion of any rollback on LGBTI rights in the rest of the United Kingdom", she said.
"Our view of Brexit I don't think has changed".
Now Mrs May is having to seek support from outside her party in order to form a government, with the anti-abortion, and anti-gay marriage DUP being just about her only option.
The DUP did not yet agree to a deal with May's Conservatives, according to Sky News, contradicting earlier reports.
"We will welcome any such deal being agreed, as it will provide the stability and certainty the whole country requires as we embark on Brexit and beyond", the Downing Street statement said.
She said the "national interest must be the primary interest", and that stability is needed as Brexit negotiations begin. "Just because they are agreeing to support us on the economic issues and the big security issues facing this country doesn't mean we agree with them on everything".
"We will be anxious to ensure that whatever the result of these negotiations is doesn't in any way adversely impact on our unique circumstances here in Ireland, with particular reference to our peace process", he told ITV.
They were replaced by Gavin Barwell, a former housing minister who lost his seat in the election.
Meanwhile, a buoyant Corbyn was insisting he saw a route for Labour to form a government, although it was not clear how he would command the support of a majority of members of parliament given the electoral arithmetic. "This is still on", Corbyn told the Sunday Mirror newspaper.
But the Conservatives remain the largest party in Parliament, and Mr Corbyn's plan to vote down Mrs May looks mathematically doomed to fail.
"This is still on", he said, adding he would vote down the government's programme when it comes before parliament this month.
"It is quite possible there will be an election later this year or early next year and that might be a good thing because we can not go on with a period of great instability", he told the BBC.
A visibly relaxed Corbyn, asked whether he would be in his own job over the long term, joked that "I've got youth on my side".