Hillary Clinton
Democratic US presidential candidate Hillary Clinton greets unionised car wash workers at the Hi-Tek Car Wash in the Queens borough of New York CityReuters

The remaining five presidential candidates will face off in New York, one of the biggest primary states, on 19 April. Voters in the Empire State could solidify the leads of Republican candidate Donald Trump and Democratic counterpart Hillary Clinton as they target victory in their home state.

New York primaries for both parties are closed, which means only voters registered with a particular party will be able to cast their ballots. Polls in New York City and the counties of Nassau, Suffolk, Westchester, Rockland, Orange, Putnam and Erie will open their polls at 6am EDT (11am GMT). The rest of the state will begin voting at 12pm EDT. Polls across the state will close at 9pm EDT.

Democrats

There are a significant amount of delegates at stake in New York. Democrats will have a chance at 247 delegates, which will be awarded proportionally. Hillary Clinton maintains a notable lead over Vermont Senator Bernie Sanders in terms of delegates, 1,289 to Sanders' 1,045. That difference surges once superdelegates are counted to 1,758 for Clinton and 1,076 for Sanders.

Clinton also holds a significant lead over her rival in the Empire State. The latest polls by Emerson (17 April) and CBS News/YouGov (15 April) show Clinton firmly ahead with double digit leads in both polls. The most recent by Emerson has the former secretary of state ahead by 15 points, 55% to Sanders' 40%. The CBS News/YouGov poll, meanwhile, puts her ahead by just 10 points, 53% to 43%.

Following New York, the lone two Democratic candidates will face off again on 26 April, with five states at play: Connecticut, Delaware, Maryland, Pennsylvania and Rhode Island.

Republicans

The three presidential candidates for will also vie for a considerable number of delegates, with 95 up for grabs. Real estate mogul Donald Trump leads the pack with 744 delegates. Ted Cruz trails him with his 559 delegates. Meanwhile, fellow GOP candidate John Kasich is further behind with a mere 144 delegates.

The primary could help Trump clinch the lead, but it could also help advance Cruz or Kasich's campaign inch closer to nomination. Republican delegates in New York will also be awarded proportionally.

Several recent polls show the bombastic former reality TV star has an astonishing 30 point lead over Kasich and Cruz. Emerson and CBS News/YouGov polls reveal Trump is first with 55% and 54% respectively. He's followed by Kasich in the Emerson poll with 21% and by Cruz in the CBS News/YouGov poll with 21%.

Like the Democrats, Republicans will also face off on 26 April in Connecticut, Delaware, Maryland, Pennsylvania and Rhode Island.