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.