Donald Trump wins Republican presidential primary in New Jersey

WASHINGTON (AP) -- Presumptive Republican nominee Donald Trump has picked up 51 delegates by winning New Jersey's Republican primary.

Trump already has the support of enough delegates to win the Republican nomination for president. With no one else left in the race, he is on track to substantially pad his lead in Tuesday's contests.

There are 303 delegates at stake in five Republican primaries Tuesday.

Trump has 1,290 delegates. It takes 1,237 delegates to win the GOP nomination for president.

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