He's the second senior minister to resign in the past 24 hours, the result of an internal power struggle over how Brexit negotiations should proceed.
The front page of the respected broadsheet Le Monde says Davis Davis "slams the door" behind him on his way out of the Cabinet and inside says his snub to May's Brexit plan "could not have been more violent".
Chief worldwide correspondent Phil Williams reports from London.
In comments likely to alarm Mrs May, Trump acknowledged the "turmoil" facing her government but said he was nevertheless looking forward to "an interesting time" when he visits the United Kingdom later this week.
More than 50,000 people have signed up to demonstrate in London on Friday when protesters intend to fly a large balloon over parliament portraying Trump as an orange, snarling baby although a counter-gathering to welcome him is also planned.
Mr Johnson's almost two years as foreign secretary was not without controversy, with the ambitious Tory heavyweight having been accused of undermining Mrs May on more than one occasion - and making headlines for other reasons.
"Perhaps, one side effect of my departure might be to put a little pressure on the government not to make any other concessions and I will keep arguing to say there is a better way to do it than this", Davis said.
"This policy will be bad for our country and bad for the party", said the Lewes MP.
May's supporters are now reported to be anxious that more ministers could go and a no-confidence vote could be triggered.
"Now is the time to rally behind the Prime Minister and give her our full and total support".
In addition to the prime minister's office, the three most critical cabinet positions - Treasury, the Foreign Office and the Home Office - are safely in the hands of those who voted to remain in the EU.
Rees-Mogg made a call to arms for the Euroskeptics in his own party and across the country to reject the consensus achieved within the Cabinet.
But the leader of the Scottish Conservatives Ruth Davidson said Mrs May was "correct to accept the Foreign Secretary's resignation".
All we have asked from the Prime Minister, is that she sticks to what she has promised on repeated occasions, when she declared that "Brexit means Brexit" and pledged to take back control of our money, borders and laws.
Noting that the U.K.is in political turmoil before departing for Europe, President Trump failed to offer a word of encouragement in support of Theresa May, observing that her future was "up to the people".
Trump isn't expected to directly address Brexit, nor were he and Johnson scheduled to meet.
They worked in '98 and we worked today, we reached out target to get to the final. "We must take advantage of it now". Fans in Paris celebrate France's victory against Belgium in the World Cup semi-finals.
Australia's D'Arcy Short, Jason Roy of England and Solomon Mire also achieved career-best rankings following the latest update. In the bowling table, Rashid Khan of Afghanistan and Shadab Khan of Pakistan have retained the top two positions.
Defense lawyer Khin Maung Zaw said Monday that the defense team would "hope for the best, but prepare for the worst". About 700,000 Rohingya have fled to neighbouring Bangladesh since the crackdown began last August.
Everybody knows that at a certain point in time that turned into something else, but that just happens when you're 18, 19. The singer and the model kissed while they were overlooking NYC's East River in a video that was obtained by TMZ .
Previously, it was thought that for a dinosaur to grow to giant size, straight legs and continuous rapid, growth were essential. The last, iconic sauropods had the benefit of a long history of evolutionary innovation in this regard, said Dr Apaldetti.
Of course, let's not forget the official advice, and that is to breastfeed your child for his six months of life - exclusively. They also woke less frequently. "This is quite a well-designed study to actually answer that particular question", he said.
Although the signs are unable to log offending number plates, such a feature is being considered for development in the future. The signs have been set up in four locations around Norfolk and will be moved to new sites in a month.
Liverpool have opened talks with Stoke City over a potential transfer for Xherdan Shaqiri , a source has confirmed to ESPN FC. Shaqiri's involvement at the World Cup ended last week when Switzerland were knocked out of the tournament by Sweden.
The paper also tweeted a photo of his scooter abandoned by the side of the road with a Mercedes estate vehicle just feet away. George Clooney at the 46th AFI Life Achievement Award Gala Tribute at the Dolby Theatre in Los Angeles on June 7, 2018.
Facebook also received a minor fine of $164,000 from French regulators for failing to meet the country's data protection rules. A Facebook spokeswoman said the company was cooperating fully with an investigation by Australia's privacy commissioner.
Courtois wants Madrid return because of his children
Courtois made 154 appearances for Chelsea , and has won two Premier League titles, the FA Cup and the League Cup. Chelsea are eyeing Leicester City goalkeeper Kasper Schmeichel as a potential replacement for Thibaut Courtois .
Oil prices at highest level in three years
Some observers question whether such high rates of production could be implemented quickly and sustained for any length of time. Boosting production this way might risk a decline in oilfield pressure that could result in long-term damage to the reservoirs.
Wales appoint Pivac as coach to succeed Gatland
Pivac has performed the same role at the Scarlets since 2014, masterminding a Guinness Pro12 title a year ago and securing passage into the semi-finals of the Champions Cup in the same season.
First Israeli spacecraft to land on moon next year
Although the Google prize expired in March without a victor having reached the moon, Israel's team pledged to push forward. On the moon, the vessel will transmit data to the control centre at IAI for two days before its systems shut down.
All 12 boys and coach rescued from Thai cave
The boys were exploring the caves on June 23 with their coach when they were trapped inside by heavy seasonal rains. The boys will remain in hospital for at least a week to ensure they don't have any infectious diseases.
Why Meghan Markle Wore Green for Her Royal Visit to Ireland
Britain's Catherine , Duchess of Cambridge holds Britain's Prince Louis of Cambridge on their arrival for his christening service. The monarch was due to return to London on Monday ahead of a busy schedule of events including a meeting with U.S.
Williams, Federer reach quarterfinals at Wimbledon
Drake has been spotted supporting his rumoured ex-girlfriend Serena Williams at Wimbledon. "The "1" part does, but not the '5'". The two met last month in the second round at the French Open, with Williams winning in straight sets.