Obama added that Trump has shown he is "woefully unprepared to do this job" after his comments on military families as well as his handle on foreign affairs.
With 55,000 of his home fans roaring their support at the London Stadium, the 34-year-old Briton sprinted away with his 10th consecutive gold medal in a global track final, a dazzling sequence that ranks among the greatest feats in sport.
A summary of sports events and sports persons, who made news on Tuesday
The Toyota Fortuner returns in a sleek, feature-packed avatar, writes Joshua David Luther
Monaco's firepower was far too hot to handle for Olympique de Marseille as the Principality side moved top of the French Ligue 1 standings with a 4-0 home win on Saturday.
List of men's singles champions at Wimbledon:
Manchester City paid the price for missed chances as they were held to a 1-1 draw at Burnley on Saturday with Johann Berg Gudmundsson's 82nd minute equaliser earning the hosts a share of the points.
"We will be doing something very rapidly to do with the additional security for our country. You'll be seeing that sometime next week," Trump said.
News of all that's transpired on and off the football field.
A round-up of our favourite photographs from the week gone by.
Even though the powers of the board of directors stand suspended once a company's insolvency process begins, it does not absolve the directors from actions taken up to two years earlier.
India qualified automatically for the event as hosts. They have prepared well with the All India Football Federation (AIFF) sending the players for training tours in Europe and a tournament in Mexico but the home side are the clear underdogs.
News of all that's transpired on and off the football field
The FBI chief also trashed President Donald Trump's allegation that his Trump Tower was wiretapped on the orders of his predecessor Barack Obama.
World champions Germany will not be present at the Euro 2016 final in Paris after being knocked out by hosts France 0-2 at Marseille. French football fans painted the town red, white and blue after Antoine Griezmann scored twice to take his country within a striking distance from European glory. The Les Blues will now face Cristiano Ronaldo's Portugal in the final at Paris.
Images from the UEFA Champions League matches played on Tuesday.
These 12 photographs show what a mad, mad world we live in!
These companies have survived bankruptcies.
In the earlier match on the night, Ghana beat debutants Niger 2-0, face Mali in quarters
Trump said that his proposal should be supported by both parties (Republican and Democratic) as a fair compromise -- one where nobody gets everything they want, but where the country gets the critical reforms it needs.
England's Adam Lallana scored his first international goal with the last kick of the game as they beat 10-man Slovakia 1-0 in their World Cup Group F qualifier on Sunday to get new manager Sam Allardyce's reign off to a winning start.
With Liverpool still to visit Chelsea, who trail them by nine points with two games in hand, Juergen Klopp's side may have to beat Brighton & Hove Albion on May 13 and rely on their superior goal difference to qualify for the Champions League, assuming they do not secure it by winning this year's trophy.
There's a car and bike to match every personality and every budget in 2018, say P Tharyan and Joshua David Luther
United States President Barack Obama has called for national "soul searching" over gun violence and expressed his "frustration" over gun lobby not letting him push through a legislation to put a stop to rampant shooting sprees.
The last-16 knock-out round kicks-off this week with Chelsea visiting Paris on Tuesday; Zidane to coach Real Madrid as manager in his first match in Europe
Qualifier Nepal caused the first major upset of the World Cup, shocking New Zealand by 32 runs in a Group D match in Fatullah on Thursday.
States across America are beginning the process of digging their way out of record-breaking snowfall on Monday after Winter Storm Jonas battered the nation's East Coast, wreaking havoc on millions and turning major cities into ghost towns.
The regional fallout could continue.
A white police officer who shot an unarmed black teenager sparking weeks of riots in the US town of Ferguson would not be indicted, a grand jury has ruled, amid mounting anger in the streets.
Lionel Messi, Luis Suarez and Neymar combined to devastating effect as Barcelona swatted Celtic aside 7-0 at the Nou Camp to lay down a marker in Champions League Group C on Tuesday.
'One of the great assets that India has is its enormous intellectual content, enormous intellectual developmental content, and some of the things we need to be working on are unmanned systems, for example, the enormous opportunities for us to jointly partner and develop -- not simply sell our equipment to India -- but actually partner and develop in areas like drones, areas like advanced aircraft and even areas around certain missile systems, where we can have a win-win.'
Images from the English Premier League matches played on Saturday
New Zealand are placed in Group B along with Turkey, Paraguay and Mali.
People magazine has returned with its annual list of best-dressed women. Here are the top 11 ladies who are making heads turn.
Discovery Channel will soon telecast an inspiring program on people who have overcome physical handicaps.
A summary of Wednesday night's matches inthe UEFA Champions League.
Wearing pink, pointy-eared hats to mock the new US president, throngs of protesters descended on the US capital and other cities around the globe to show Donald Trump they won't be silent over the next four years.
A risk-taker, she'll always be remembered for her unforgettable style and daring fashion choices as a First Lady.
With 2016 officially behind us, let's look forward and speculate about the events, people and issues that will shape 2017.
All this caucus talk and the US elections itself has left you confused, don't worry, we're here to help.