Wisconsin up for grabs as Trump, Clinton seek upsets

Republican frontrunner Donald Trump and his Democrat counterpart Hillary Clinton are underdogs to their feisty rivals as the Midwestern state of Wisconsin votes Tuesday in the US presidential primary race. Trump's main rival Senator Ted Cruz is eyeing the Badger State as a crucial firewall against the celebrity billionaire's march to an outright nomination victory. Like Trump, Clinton risks losing Wisconsin, where she faces a surging Bernie Sanders who has won five of the last six contests.