May, once a reluctant supporter of European Union membership who emerged from the chaos after the 2016 referendum as Prime Minister, steps down with her central pledge - to lead Britain out of the bloc and heal the country's divisions - unfulfilled.
The Conservative leadership contest risks deepening the rift in the party over when, how or even if to leave the European Union - with a few of the almost dozen contenders ruling out serving in a future cabinet - if they are vanquished and lose out to a rival.
"Whoever becomes the new Conservative leader must let the people decide our country's future, through an immediate general election".
Nominations for party leader will close on Monday afternoon. He said Britain was "on course to leave by October 31", but he'd be willing to agree to a further delay if needed to finalise a deal. And Parliament has repeatedly voted to rule out leaving without a deal, though it's not clear how lawmakers could stop a prime minister who was determined to do it.
Also in the running are such figures as Jeremy Hunt and Michael Gove, who say they can renegotiate the pullout agreement with the European Union to get better terms.
The number of contenders will be whittled down to two with a series of votes.
The poll was taken using 1670 adults from Great Britain who submitted answers between June 5-6.
With the worst performers eliminated each time, the goal is to have two candidates left by 20 June.
The first phase will see party MPs vote in several rounds from next week until the candidates are whittled down to two.
The next Xbox console will release "Holiday 2020"
During the Xbox E3 briefing, Microsoft gave fans first details on the upcoming next-generation of Xbox consoles. It then proceeded to share two more with the codes G 36 and B 0 in the same fashion.
The final two candidates will be put to a postal ballot of about 160,000 Conservative members, with the victor announced the week of July 22.
May will keep the keys to Downing Street until her successor is elected when she will retire as prime minister and hand over the reins of power.
The Peterborough election was triggered when Labour's Fiona Onasanya became the first member of parliament to be ousted in a recall petition, after she was jailed for lying about a speeding offence.
If the government loses, Britain will be headed for a snap election within weeks.
It was the bookmakers' favourite to win in Peterborough, which supported Brexit by 61% to 39% in the 2016 referendum.
Raab has suggested he might suspend Parliament if it looked like lawmakers were about to stymie Brexit.
Rivals distanced themselves from that idea, which runs counter to Britain's tradition of parliamentary sovereignty.
Calling for Tories to vote tactically for his party, he told BBC Radio 4's Today programme: "The danger is that, in seats like this, the Conservatives split the Leave vote".
Mr Farage's endeavour to "challenge the insular political class" and "push for fundamental democratic reform across our unrepresentative political system" through devolving aspects of decision-making to its members evokes one of the mechanisms of the Italian anti-establishment Five Star Movement, which employs direct democracy on policy including proposing laws and even holding confidence votes in its party leader.