Republican presidential front-runner Donald Trump tried to put a difficult week behind him and rally his supporters. (File Photo)
Republican presidential front-runner Donald Trump tried to put a difficult week behind him and rally his supporters on Monday ahead of a crucial nominating contest in Wisconsin, where he was in the unfamiliar position of underdog.
Opinion polls show Trump trailing US Senator Ted Cruz of Texas in the Midwestern state, where a loss on Tuesday could dent the New York billionaire's aura of inevitability and make it harder for him to win the 1,237 delegates needed for the party's nomination for the Nov. 8 election.
Trump hunted for support at two rallies in the state on Monday, telling voters in La Crosse, Wisconsin, they could propel him towards the nomination by delivering him a surprise victory over Cruz.
"If we do well here, folks, it's over," Trump said. "This could be the real beginning. If it's not, I think we get there anyway and I'm pretty sure we get there anyway."
Trump said an array of forces were aligned against him in Wisconsin, including the state's governor, Scott Walker, who has backed Cruz, a "very hostile media" and party establishment figures worried he will lead Republicans to a broad defeat in November.
He ridiculed the "NeverTrump" movement to block his nomination and said the party establishment should have put the same effort into beating President Barack Obama in 2008 and 2012.
"If they had worked this hard to stop Obama, Obama wouldn't have had a chance," Trump said at a rally in Superior, Wisconsin.
He also said it was "unfair" that rival John Kasich, the governor of Ohio, refused to get out of the race despite trailing Trump and Cruz badly.
Trump has won 736 delegates to the July nominating convention in Cleveland, but is till 501 short of the majority he needs to clinch the nomination. Rivals Cruz and Kasich hope to stop him short of a first-ballot victory and trigger a contested convention.
"My eyes are wide open," Trump said in Superior of the possibility the party establishment would manoeuvre to deny him the nomination at the convention. "We're dealing with a corrupt system.
We're dealing with a system that is not fair."
Cruz told reporters the party was beginning to rally behind him, and said a win in Wisconsin would spark a surge of momentum for him in upcoming contests.
'A UNIFYING PARTY'"What we're seeing is the party unifying behind our campaign," Cruz said in Madison. "I hope and believe tomorrow night's going to be a very good night here in Wisconsin."
A Trump loss would cap a rough week, including an avalanche of criticism for his suggestion, which he later dialled back, that women be punished for getting abortions if the procedure is banned.
Uncharacteristically, Trump also acknowledged that he made a mistake retweeting an attack on Cruz's wife, according to the New York Times.
He also drew fire last week for saying he would not rule out using nuclear weapons in Europe and that Japan and South Korea might need their own nuclear arsenals to ease the US financial commitment to their security.
Cruz was eager to capitalize on Trump's missteps, talking about his family during a town hall session in an attempt to soften his strident image and appeal to women turned off by Trump's recent comments.
At a later rally, Cruz told voters the entire country was looking towards Wisconsin.
"Let's show the country that this race is not about yelling and screaming and insults," he said in Madison.
Even with a victory in Wisconsin, Cruz still faces difficult odds to win the delegates needed to secure the nomination, given that the next states to vote, including New York on April 19 and five Northeastern states on April 26, are more Trump-friendly territory.
Cruz has 463 delegates, 774 short of the total needed for the nomination, according to an Associated Press count. Kasich, with 143 delegates, has no chance to gather enough delegates to win on the first ballot but has refused to end his candidacy.
He rejected Trump's call for him to get out of the race and poked fun at the front-runner's complaints.
"I've got news for him. I'm gonna get a heck of a lot his voters," he told a town hall meeting in Hempstead, New York. "I know how to fix these things that the Trump voters care about."
In the Democratic race, US Senator Bernie Sanders of Vermont has a small lead in opinion polls in Wisconsin over front-runner Hillary Clinton and is trying to add to his momentum after winning five of the last six contests.
A Wisconsin win by Sanders would put the focus on the April 19 contest in New York, where Clinton was campaigning on Monday.
Sanders still faces a tough task to overcome Clinton's lead of 263 pledged delegates in the Democratic race, which awards all delegates proportionally to their vote totals in each state.
At a New York City event celebrating a hike in the state minimum wage to $15 an hour, Clinton noted Trump has said wages are too high. That drew boos from the crowd, which included a large number of labour union members.
"I don't know what the calculation is by Trump and others but I'll tell you this: They are selling Americans short," Clinton said.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)