Trump scored a massive win Florida, which he termed as his second home, by gaining the support of 45.5 percent of the votes counted, while Rubio was a distant second with 27.1 percent of the votes.

Florida Senator Rubio, who had so far won primaries in Minnesota, Puerto Rico and Washington DC and had 163 delegates, was banking heavily on a win in his home state. But

Trump's victory margin of more than 400,000 put curtains down on his presidential ambition.

The 44-year-old was endorsed by maximum number of partyleaders, governors, senators and Congressmen. Indian-American leaders -- former Louisiana governor Bobby Jindal and South Carolina Governor Nikki Haley -- were among the prominent Republican leaders backing Rubio.

In his speech in Miami, Rubio acknowledged that the country is in the middle of a political storm – tsunami.

"America's in the middle of a real political storm," Rubio said.

"While this may not have been the year for a hopeful or optimistic message about our future, I still remain hopeful and optimistic about America," said the Florida Senator.

Noting that it was "not God's plan that I be the President in 2016", Rubio urged his countrymen not to give up on the sense of optimism he tried to push.

Rubio said this was not his time, but would continue to be fighting for the rights of the people of his country.

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