LAS VEGAS (AP) – 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 leadoff 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.