Our own Nick Allen went to Donald Trump's caucus-eve rally last night in Las Vegas. Here's what he saw: Donald Trump threatened to punch a protester in the face and suggested he would like to see the man removed on a stretcher. The billionaire made the comments at a rally attended by thousands of his supporters in a Las Vegas rodeo hall on the eve of Nevada becoming the fourth state to vote in the race for the Republican presidential nomination. As a middle-aged man in a grey T-shirt was ejected by security Mr Trump said: "You know what? I miss the gold old days. We’re not allowed to punch back any more. You know what they used to do to guys like that in a place like this? They'd be carried out on a stretcher. "I hate to see that, there's a guy throwing punches, nasty as hell, screaming as we're talking, The guards are very gentle and he's walking out smiling. I tell you, I'd like to punch him in the face." Trump leaves the stage after saying he'd like to punch a protester in the face pic.twitter.com/4xqzzykazl — nick allen (@nickallen789) February 23, 2016 To cheers from the crowd Mr Trump then moved on to talking about waterboarding terrorists. "I think it’s great but I don’t think we go far enough," he said. Mr Trump added: "I'm not a mean guy, I'm a nice guy, I just don't want to be pushed around by a bunch of animals." Trump: "I'm going to use the Vatican wall as model for my wall." — nick allen (@nickallen789) February 23, 2016 Mr Trump's campaign estimated the size of the crowd as 8,000 and claimed it was the biggest political rally to have ever taken place in Las Vegas. The billionaire, who owns a 64-storey hotel in the city, is between 16 and 26 percentage points ahead of his rivals Marco Rubio and Ted Cruz in Nevada. There were loud boos from the crowd at the mention of Mr Cruz. "This guy is sick, there's something wrong with him," said Mr Trump. "He holds the Bible in one hand and lies." Big Trump crowd in Nevada pic.twitter.com/z3YVWBi0RQ — nick allen (@nickallen789) February 23, 2016 A member of the audience in a "USA" jacket shouted "Canadian," a reference to Mr Cruz's birth in Canada.