Cruz's win invigorates anti-Trump camp

Republican Donald Trump emerged from Wisconsin as a damaged front-runner following a crushing primary loss to rival Ted Cruz, deepening questions about the billionaire businessman's presidential qualifications and pushing the Republican Party toward a rare contested convention nomination fight.

Democrat Bernie Sanders also scored a sweeping victory on Tuesday in Wisconsin's primary that gives him fresh incentive to keep challenging Hillary Clinton. But Sanders still lags significantly behind Clinton in the all-important delegate count.

Both parties were turning their sights to New York, which offers a massive delegate prize in its April 19 contests. It marks a homecoming of sorts for several candidates, with Trump, Clinton and Sanders all touting roots in the state.

Trump, who has dominated the Republican race for months, suddenly finds himself on the defensive as the race moves east. He's struggled through a series of missteps, including his campaign manager's legal issues after an altercation with a female reporter and his own awkward explanation of his position on abortion.

Deep worries

Exit polls in Wisconsin highlighted the deep worries about Trump surging through some corners of the Republican Party. A majority of Republican voters said they're either concerned about or scared of a potential Trump presidency, according to surveys conducted by Edison Research for The Associated Press and television networks.

Cruz has stepped forward as the candidate best positioned to block Trump, though it would likely take a convention battle to accomplish that goal. An ultraconservative Texas senator with a complicated relationship with Republican leaders, Cruz cast his Wisconsin victory as a "turning point" in the race and urged the party to rally around his candidacy.

"We've got the full spectrum of the Republican Party coming together and uniting behind this campaign," he said.

Trump was unbowed in his defeat. His campaign put out a biting statement accusing Cruz of being "worse than a puppet - he is a Trojan horse, being used by the party bosses attempting to steal the nomination from Mr Trump."

Sanders still trails Clinton in the pledged delegate count and has so far been unable to persuade superdelegates - the party officials who can back any candidate - to drop their allegiance to the former secretary of state and back his campaign.

With most of Wisconsin's delegates allotted, Clinton now has 1,274 delegates to Sanders' 1,025, based on primary and caucus results alone. When the superdelegates are included, Clinton has a wider lead - 1,743 to 1,056. It takes 2,383 delegates to win the Democratic nomination.

In the Republican race, Cruz won at least 33 Wisconsin delegates, while Trump carried at least three. Six delegates are still up for grabs, pending the outcome in two congressional districts.

With Wisconsin results included, Trump leads with 740 delegates to Cruz's 514, while Ohio Governor John Kasich has 143. It takes 1,237 delegates to win the Republican nomination.

AP - AFP