Former President Donald Trump maintains his authoritative lead in the Des Moines Register/NBC News/ Mediacom Iowa Poll released Saturday. 

The last Iowa poll before the caucuses shows that Trump and Florida Gov. Ron DeSantis have lost some support, around 3 percent each, since the December edition of the Iowa Poll. It also shows that former U.N. Ambassador Nikki Haley and Ohio entrepreneur Vivek Ramaswamy gained support in December. 

The poll of likely Iowa GOP caucusgoers found 48 percent support Trump, 20 percent support Haley, 16 percent support DeSantis, and 8 percent support Ramaswamy. 

The poll is widely considered a gold standard poll for its accuracy in predicting the final results of the Iowa caucuses. 

The poll also showed that enthusiasm among Haley’s supporters might be critical to Monday’s results. 

Only 9 percent of Haley’s supporters are extremely enthusiastic while 49 percent of Trump’s supporters are extremely enthusiastic to support their candidate. 

The plurality of her supporters are only mildly enthusiastic, according to the Iowa poll. 

With caucusgoers having to bear frigid temperatures on Monday, some worry that it could affect voter turnout at the caucuses. 

Trump attributed the win in the polling to his campaign organization. 

“Our grassroots supporters have put us in a position to win, and now we have to show up to the caucus for President Trump on Monday and get the job done,” Trump said in a news release on Saturday. “We have to show up.”