LAS VEGAS- Donald Trump's efforts to build a get-out-the-vote effort in Nevada don't appear to match those put together by Florida Sen. Marco Rubio and Texas Sen. Ted Cruz, who won Iowa's lead-off caucuses on the strength of his ground game.
    
Nevada's caucus model demands more of a time commitment from voters, takes place on a Tuesday night and requires participants to have gotten their registration in order more than a week ago.
    
Because of that, those in Rubio's camp hope what they feel is a superior ground game will pay off against GOP presidential front-runner Trump.
    
The billionaire businessman, meanwhile, leading in the few preference polls taken in the state ahead of Tuesday's caucuses, suggested recently a win on Tuesday is a foregone conclusion.