13 December, 2018
She insisted she would stay on to "finish the job" she has set herself as Prime Minister.
And Medway council leader Alan Jarrett said he had lost confidence in the leader but did not want her to stand aside yet.
Ahead of the vote, Cabinet colleagues rallied to May's support.
However, if May loses the vote, then Graham Brady will invite nominations for her replacement.
The prime minister that promised she would be strong and stable is instead at the top of a party that looks weak and chaotic at a vital time.
Mrs May's supporters cheered wildly at the initial announcement that the Conservative Party's MPs did have confidence in their prime minister.
Several leading Brexiteers, including former Foreign Secretary Boris Johnson and ex-Brexit Secretary Dominic Raab, have said loudly that they think they could get a better deal with the European Union, and are likely to enter a race to replace her.
A wave of new letters was submitted to Sir Graham amid anger at Mrs May's dramatic decision on Monday to put on hold the crunch Commons vote on her Brexit deal after admitting she was heading for a heavy defeat. "The PM is working in our national interest and this distraction risks damaging uncertainty". "It's the right thing for the country".
I will vote for the Prime Minister.
Under party rules, if 15 per cent of Tory members of parliament write to the chairman of the backbench 1922 committee expressing no confidence in their party leader, then a ballot is triggered.
She will remain leader, and prime minister, until the successor is picked.
After the "meaningful vote" was postponed this week in an embarrassing step-down, Number 10 has said the vote will take place some time before 20 January.
After a day of high drama at Westminster, May defeated the challenge to her authority - but only after making an emotional pledge that she would not lead her party into the next general election.
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The president also touted an agreement with China to reduce tariffs on cars entering China from the United States. What pushed the two sides to the table? China would also buy agricultural products from U.S. farmers immediately.
But in a joint statement, the chairman of the European Research Group of Eurosceptic Tory backbenchers Jacob Rees-Mogg and his deputy Steve Baker said: "Theresa May's plan would bring down the Government if carried forward".
Solicitor general Robert Buckland, also speaking outside the meeting, said: "the party has to be prepared to give her the space to go back to the EU".
Sheneeds to secure the votes of 158 MPs - half the parliamentary party plus one - to remain as Conservative leader, though a vote of 100 or more against her will raise questions about whether she can continue.
Mrs May has said she is seeking guarantees that this clause will be "temporary" but the Democratic Unionist Party, which she relies on to win key votes, wants the backstop to be ditched altogether.
"It is clear that neither Theresa May nor a new party leader will be able to get a better deal from the EU".
Labour frontbencher Rebecca Long-Bailey said: "This deal that she has on the table will not get through Parliament". "The only people whose interests that would serve would be [Labour leader] Jeremy Corbyn and John McDonnell".
The prime minister spoke to media following the vote, saying she will work to "bring the country back together" while also delivering on her Brexit promises.
May cancelled a trip to Dublin on Wednesday for talks with Irish Prime Minister Leo Varadkar amid the leadership challenge. Candidates for leadership must be nominated by two Conservative MPs and May would be barred from participating as a candidate.
"I'll be supporting the PM tonight", he said.
Removing her as prime minister will not change anything except delay Brexit or halt Brexit, she said.
Still, he remains very popular with the party's membership: people queued for hours to see his speech at the Conservative Party Conference in October, which was widely seen as a pitch to replace May.
May on Monday cancelled a parliamentary vote on the deal, which is created to maintain close future ties with the European Union, after it became clear she would lose it.
"It isn't even clear that all Brexiteers are comfortable with a no deal scenario, which of course will be opposed by the majority of MPs in the House of Commons".
Lib Dem Oxford West and Abingdon MP Layla Moran condemned the vote of no confidence.