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.
Maduro claims Donald Trump might win because of 'flawed' electoral system in the US.
Cheeky slogans in support of Bernie Sanders replaced safety messages in Dallas, Texas
The Democrat rivals will hold further talks on how to bring the party together next week.
Donald Trump has outraged and enthralled, but will he change tack as presumptive Republican candidate?
Millennials aged 18-35 that believe that the political process can solve the problem is at an all-time low.
More than 1,000 protesters turned out for anti-Trump rallies in the city close to the US-Mexico border.
Trump said he would wait to debate the first place finisher, probably Hillary Clinton, or whoever it is.
Billionaire's anti-immigration stance has resonated with American voters who feel left behind
Trump said he was serious about the debate if networks donated millions to women's health charities.
The insect landed on The Donald's locks during a rally in California.
The two candidates face off in the Golden State on 7 June for the chance of 475 delegates.
The presidential candidate slammed Trump over his recent comments on the UK and North Korea.
The presidential candidate said that, if elected, he would terminate Debbie Wasserman Schultz's DNC chairmanship.
Clinton says her contest with Vermont senator is effectively over ahead of June primaries.
The Vermont senator is facing Hillary Clinton in the race for democratic nomination.
National Intelligence Director James Clapper said the problem is likely to grow 'as the campaigns intensify'.
The likely Democratic nominee held a mere 0.5% lead over Bernie Sanders with 99.8% of the votes counted.
The two Democratic candidates vied for 55 delegates in Kentucky and 61 in Oregon.
Allen 'sexually assaulted a child and that's not right,' says actress at Cannes Film Festival.
Sanders' supporters accuse the Nevada State Democratic Party of skewing the results in favour of Clinton.