Trump's popularity highlights digital media's weakness in keeping politicians honest.
The DC primaries were largely symbolic as Clinton already has enough delegates to win the Democrat nomination.
The US president will try to unite the Democrats to take on Donald Trump in the election in November.
Incumbents who broke through barriers soon learn that established systems hold out against fundamental reform.
The progressive Democrat could prove useful in bringing in Sanders' supporters in the general election.
The former secretary of state said it was an historic moment for the country.
Campaigns says emails 'should absolutely be released' for allegedly backing the 12-nation Trans-Pacific Partnership deal.
Voters voted in six states: California, Montana, New Jersey, New Mexico, North Dakota and South Dakota.
Democrats divided ahead of the 7 June primaries.
Clinton will become first woman nominated for US president by a major political party, according to AP.
Voters will also cast their ballots in California, Montana and New Jersey on 7 June.
Voters to head to the polls in 6 states for the biggest delegates haul ahead of July conventions.
Trump maintained that federal Judge Gonzalo Curiel is unfair towards him because of his Mexican heritage.
The rally saw Donald Trump delighting his supporters, vowing to build a wall along the US border and have Mexico pay for it.
The protesters shouted anti-Trump slogans and burnt an American flag and Trump's Make America Great Again hats.
'Donald Trump's ideas aren't just different, they're dangerously incoherent,' said Clinton, in a blistering attack.
The Wisconsin Republican's endorsement was made in a guest column for the newspaper Janesville Gazette.
Democratic frontrunner unloads on her Republican rival over Trump University's shady business practices.
The president declined to use Trump's name, saying: 'I figured I'll let him do his advertising for him.'
Republican candidate's UK trip on 24 June might be extent of his impact on British politics.
In a recent survey Yiannopoulos asked people whether they would rather their child had feminism or cancer
The Democrat rivals will hold further talks on how to bring the party together next week.