Donald Trump, Hillary Clinton declared Missouri primary winners, a month on

This file photo taken on March 2, 2016 shows a combination of file photos of Republican presidential hopeful Donald Trump on Jan 14, 2016 and his Democratic rival Hillary Clinton on Feb 4, 2016.
This file photo taken on March 2, 2016 shows a combination of file photos of Republican presidential hopeful Donald Trump on Jan 14, 2016 and his Democratic rival Hillary Clinton on Feb 4, 2016. PHOTO: AFP

NEW YORK (AFP) - Presidential frontrunners Donald Trump and Hillary Clinton were on Tuesday (April 12) declared the official winners of the Missouri primaries - nearly a month after they were held.

The March 15 votes in both parties were extremely close: Clinton and rival Bernie Sanders were neck-and-neck, as were Trump and Senator Ted Cruz.

Missouri Secretary of State Jason Kander finally certified the result, tweeting: "@HillaryClinton and @realDonaldTrump have officially won Missouri."

Clinton earned 49.6 per cent of the vote, to 49.36 per cent for Sanders - a margin of 1,574 votes, according to the results posted on the secretary of state's website. Each takes 34 delegates.

On the Republican side, Trump earned 40.84 per cent of the vote, to 40.63 per cent for Cruz - a difference of 1,965 votes. The real estate mogul thereby takes 25 delegates to 15 for the Texas senator.

Clinton and Trump are leading in the race to secure their respective party nominations ahead of election day in November.

The next primaries are set to take place on April 19 in New York. Clinton and Trump are both leading in opinion polls.