And according to a new Fox News poll, something seems to be working for Donald Trump's campaign.
Trump is now leading Ted Cruz among likely Republican caucus voters in Iowa. Third is Marco Rubio.
But about a third of Republican caucus-goers said they may still change their minds.
And among Iowa Republicans who have actually caucused before, Trump's lead is much smaller. Those voters chose Trump at 28 percent compared to Cruz at 25 percent.
More than a third of the Republican poll respondents who say they will caucus this year have never caucused before. Fox News found 43 percent of those rookies are Trump supporters, but also notes the poll can't tell how many of them will actually turn out.
So as the primaries get started, we'll start to find out if Trump's soaring poll numbers will translate into real votes.
This video includes images from Getty Images.