Donald Trump damaged by Ted Cruz victory in Wisconsin

Republican Donald Trump has emerged from Wisconsin as a damaged frontrunner 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 in Wisconsin’s primary that gives him a fresh incentive to keep challenging Hillary Clinton.

But Mr Sanders still lags significantly behind Mrs Clinton in the all-important delegate count.