Support in Iowa for a wall at the U.S.-Mexico border has ticked up since January 2018, but the state is still split on the policy, according to a Des Moines Register/Mediacom Iowa poll released Monday.

The survey found that 37 percent of Iowans polled said that the wall should be funded regardless of what happens otherwise with immigration policy. This is an increase of 7 percentage points from last year.

About 20 percent of respondents in Iowa said the wall should be funded as part of a broader immigration compromise, up from 15 percent.

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The poll was conducted between Feb. 10 and 13, before President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE declared a national emergency to divert $8 billion for border wall funding from other projects. More than 60 percent of respondents in an NPR poll disapproved of the declaration.

The margin of error for the Iowa poll was plus or minus 3.5 percentage points and 803 people were surveyed.

The Iowa caucus is the first contest of the 2020 election, and can help set the tone for later primaries, so many primary candidates focus on building support there. Iowa is also a swing state.