Reality Check: Has a governing party won a by-election since 1878?
Mrs May said the Copeland result showed that the Conservatives are the party "listening and responding" to working people across Britain.
It was also the first time since 1982 that a governing party had won a Commons seat from the Opposition.
Copeland had been held by Labour for more than 80 years - the Tories' Trudy Harrison won with 13,748 votes to Labour's Gillian Throughton's 11,601.
'It's been very clear talking to people throughout this campaign that Jeremy Corbyn doesn't represent them, ' Harrison, 40, said in her victory speech.
But there was some comfort for Labour leader Jeremy Corbyn after his party held on to a parliamentary seat in the English city of Stoke.
Copeland is home to the Sellafield nuclear power plant, and much was made of Jeremy Corbyn's anti-nuclear stance throughout the campaign.
But ironically, on the same night he suffered the personal blow of losing Copeland, one of the defining decisions of his leadership - not to oppose Theresa May on Article 50 - was vindicated, at least to a degree, in Stoke-on-Trent Central, where the party ran a campaign demonstrating new-found enthusiasm for Brexit, a stance that probably helped their candidate Gareth Snell over the line in a constituency where almost 70 percent backed Brexit.
He accused the UK Independence Party of pulling out in Copeland to give the Conservatives a free run, and said the Tories had pulled out in Stoke to give Paul Nuttall a free run.
Meanwhile Gerald Jones, a Labour shadow Welsh minister, told BBC Radio Wales the result was "a significant set back for us as a party and one that we have to now rebuild from".
But in practice, the two, both widely respected, left because they could not see a future for their party under Mr Corbyn. Prepare to be told that this defeat is not Jeremy Corbyn's fault, but behind the spin, Corbyn's misjudgements are the cause of Labour's woes.
They won 42.3 per cent of votes in the 2015 General Election with Jamie Reed as their candidate, 6.5 percentage points above the Tories' share of 35.8 per cent.
The NHS was an issue that we campaigned on but the nuclear [issue] dominated and we couldn't cut through on that one...
UKIP finished with 24.72% of the vote, just ahead of the Conservatives' Jack Brereton on 24.35%.
"Two years ago at the last election that had collapsed down to about 4% more than we got yesterday".
Labour had fought the campaign arguing that it was best placed to protect a local hospital.
And she claimed hard-left "entryism" into Labour under Mr Corbyn's leadership mean Tory victory in the polls is even more crucial.
Labour had held both seats since their creation. It's likely that Corbyn will now shamelessly cling on for at least half a year until Labour Party Conference, where he and his team will seek to change the rules to ensure his successor is from the same part of the party.
"We have to got to work out how we are going to build alliances with people who share our values across the political parties, but also those outside politics".
During the 16-17 season, Williams is averaging 13.1 points, 2.6 rebounds and 6.8 assists in 29.3 minutes per game. Ferrell averaged 15.3 points per game and 4.6 assists, leading the Mavs to five wins in seven games as a starter.
Except for the fast food area, the Sunday penalty rates have not been brought to the same level as Saturday penalty rates. Penalty rates "frustrate the job aspirations of the unemployed and those who are only available for work on Sunday".
The Sauber C36-Ferrari was designed with an emphasis on " aerodynamic stability " rather than maximising downforce performance. With the tires one might be able to mask deficits and get development concepts to work better.
Microsoft has today revealed March's Games with Gold titles for Xbox One and Xbox 360 and I'll be honest, I'm a little confused. Evolve: Ultimate Edition includes the base game The Monster Expansion Pack, Hunting Season 1 DLC and Hunting Season 2 DLC.
His slow crawl into the VC world can be traced back in 2011, when Roc Nation invested in Stance , a "premium sock company". He's also invested in JetSmarter and Uber, according to Crunchbase , which collects VC investment data.
Al-Bashir was allowed to leave South Africa even though a local court ordered authorities to arrest him. South Africa said it was quitting the ICC because membership conflicted with diplomatic immunity laws.
If not for the controversy over potential interference, T-Mobile likely would have deployed LTE-U much earlier. This spring, cellphone carriers such as T-Mobile plan to start supporting a new kind of mobile data.
The real challenge is sorting through the varying punctuation of "presidents"-it's enough to make any copy editor dizzy". Financial markets are closed in the U.S.as the New York Stock Exchange and Nasdaq will observe the President's holiday.
Taking on another player with sound physical tools and a busted jumper is not, by any means, the ideal return for Noel. In all, seven deals were completed prior to the deadline, with some teams really helping their chances this season.
In an interview in 2016, Channel 2 Action News interviewed a man who started a podcast about the case. Witnesses last saw Grinstead at a beauty pageant, then at a co-worker's barbecue before she went home.
In the FB video, Vishnu is then seen demanding to know what law he broke by sitting with his arm around the shoulders of a woman. The constables, she said, asked whether they were married or not. "We were asked whether we are going to marry or not".
Drug OD deaths almost tripled since 1999, CDC says
While all age groups saw increases in death, the 55-to-64 group saw the biggest increase, with a five-fold jump since 1999. The suicide rate is 13.4 deaths per 100,000 and the rate of deaths from auto accidents is 11.1 deaths per 100,000 people.
Thailand wins for worst traffic in world
Traffic in other global cities can be "more severe" for shorter periods, "but people in L.A. tend to sit in it longer", he says. The capital is the second most congested city in Europe after Moscow, and is the seventh most gridlocked city on the planet.
On Murdered Teen's Cellphone, a Voice Says, 'Down the Hill'
Officials are asking anyone who may have taken pictures in the area or was just on the trail to contact authorities immediately. Indiana State Police gave an update Wednesday morning on the investigation into the murders of two girls in Delphi, Indiana.
Residents evacuate after levee breach in California
In the San Joaquin Valley, residents were patrolling levees for signs of danger, reviewing evacuation plans and filling sandbags. After the flash flood warnings were issued, evacuation process also picked up pace on Monday.
Predicting MLB ROOKIE OF THE YEAR CANDIDATES
According to Reuters , Facebook are interested in broadcasting games in a bid to gain a foothold in the expanding market. Univision Communications Inc. partnered with Facebook before in order to live stream Mexican soccer games in English.
Court to rule on ICC withdrawal
At a minimum, the ruling will delay South Africa's withdrawal from the ICC, which had been scheduled to take effect in October. Mojapelo added that government decisions must be based on "the expressed authority of the constitution".