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Donald Trump, the Republican frontrunner, won Mississippi, Michigan and Hawaii on Tuesday night, propelling him closer to victory as the presidential contenders look ahead to the big March 15 contests in Florida and Ohio. Donald Trump by numbers.

In the Democratic race, Hillary Clinton won convincingly in Mississippi on the back of strong support from African-Americans, but she suffered a surprise loss to Bernie Sanders in Michigan where polls had put her 20 points ahead. (FT)

In the news

N Korea claims nuclear warhead capability Pyongyang said it has successfully made nuclear warheads for ballistic missiles, a claim which, if true, would represent a clear threat to the US. Military officials and analysts outside North Korea have debated for years the isolated nation’s ability to make nuclear explosives small enough to mount on missiles. The opacity of its nuclear programme makes it difficult to determine progress in its stated objective. (WSJ)

US investment banks open gap over Europeans Europe’s top five operators are now making less than half as much revenue as the top five in the US, which beat them on almost every financial measure last year. The US groups had investment banking and securities revenue of $138.5bn last year — more than twice the $60.1bn of the Europeans. (FT)

IMF warns on global growth The IMF said the world faces a growing “risk of economic derailment” and needs immediate action to boost demand in a global economy that is “clearly at a delicate juncture”. (FT)

Brazilian businessman jailed One of the country’s most senior businessmen, Marcelo Odebrecht, was sentenced to 19 years and four months in jail on Tuesday for alleged corruption at state oil company Petrobras in a landmark decision expected to add to pressure on President Dilma Rousseff. (FT)

Toshiba selects Canon for healthcare asset Toshiba's board has granted Canon preferential negotiating rights to its medical device business after private equity funds Permira and KKR dropped out of the bidding, underscoring the challenges for foreign buyout groups competing against cashed-up Japanese corporate stalwarts. An accounting scandal at Toshiba had made available the lucrative healthcare asset, drawing interest from a string of foreign players including Samsung and General Electric. (NAR, FT)

Top Isis commander believed killed US officials say they are hopeful that an Isis commander in Syria, described by the Pentagon as the group's "minister of war", has been killed in a US air strike. If confirmed, it would be a major victory in the efforts of the US to strike the militant group's leadership. Abu Omar al-Shishani, also known as Omar the Chechen, ranked among America's most wanted militants. (Reuters)

'Fifth Beatle' dies George Martin, an arranger, composer, conductor, audio engineer and musician, has died aged 90. He was best known as one of the greatest record producers of arguably the greatest pop band of all time, with 30 number one hit singles in the UK and 23 in the US. (FT)

It's a big day for

The human-robot rivalry Lee Se-dol, the South Korean world champion of the ancient Chinese board game Go, takes on Google’s AlphaGo machine in a high-profile contest that could yield a milestone for artificial intelligence. (FT)

Food for thought

UK productivity gamble The UK is planning to raise the minimum wage sharply for people aged 25 and over, in the belief that this will force companies to boost productivity to justify the higher pay. It is hoping to combine French levels of productivity with British levels of employment. That is a long, risky road to take. Still, the rest of the world would be crazy not to watch the experiment. (FT)

Why Hillary Clinton won't be indicted over emails For those salivating at the idea of Hillary Clinton being clapped in handcuffs as she prepares to deliver her acceptance speech at the Democratic convention, don't hold your breath. Based on the available facts and the relevant precedents, a criminal prosecution is extraordinarily unlikely. Mrs Clinton’s use of a private email server while secretary of state may be political idiocy, but it is not criminal. (WaPo)

Why fintech may be good news Optimists imagine a future in which payments, the creation of money (unquestionably liquid and safe assets), and intermediation would be separated. In this case, the capacity of the banking sector to create havoc would be reduced and so would the perils created by the state’s backstop to private institutions. It is, however, far too early to be confident of such benefits, says Martin Wolf.(FT)

FBI iPhone motive questioned Edward Snowden has described the FBI's claim that Apple has the "exclusive" means to unlock the iPhone of the San Bernardino shooter as "bullshit". Alternative methods could be used to extract the data, say experts, leading many to conclude that a key motivation behind the FBI's claim was to force the enactment of new legislation against encryption. (TheNextWeb)

Concierge robot tested Hilton is testing an artificial intelligence-powered concierge robot for its chain of hotels in the US through a partnership with IBM's Watson programme. The automaton, called "Connie" after company founder Conrad Hilton, will answer questions about nearby restaurants, tourist attractions and hotel information, but it can't check them in quite yet. (The Verge)

Video of the day

What Europe's migrant deal means Turkey and Germany have agreed to turn back all Syrians and economic migrants reaching Greek islands in exchange for sweeteners for Ankara. David Gardner, the FT’s international affairs editor, examines what this means for Turkey, Germany and the EU. (FT)

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