Most Iowa Democrats who plan to take part in the state's caucuses say candidates need to support abortion rights, view climate change as the greatest threat to humanity and back a ban on assault-style weapons to win their support, a new poll finds.

The CNN/Des Moines Register/Mediacom poll released Monday found that about 8 in 10 Democratic caucusgoers demand a candidate who supports abortion rights, while about three-fourths say the same about climate change.

About 6 in 10 say support for an assault-style weapons ban is required.

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Less than half of Democratic caucusgoers want candidates that support "Medicare for All," free tuition for public four-year colleges and restoring convicted felons’ voting rights, the poll found.

Few respondents said being older was an advantage for candidates, pollsters noted. And while about 60 percent of in-person Democratic caucusgoers said being gay doesn’t make a difference in facing off with President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE in an election, approximately 25 percent say it’s a disadvantage, CNN reported.

Most of in-person attendees — 54 percent — said a candidate's gender doesn’t make a difference in challenging Trump. Virtual caucus attendees say differently, with 28 percent calling it a disadvantage and 23 percent calling it an advantage.

The survey of 600 likely Democratic caucusgoers, conducted between June 2 and June 5, has a margin of error of 4 percentage points.