Results of a new poll carried out by NBC/WSJ/MaristNBC/WSJ/Marist were released on March 26. The poll asked participants from Iowa for whom they would likely vote if the Democratic Party nominated Hillary Clinton and the Republican Party nominated Donald Trump.
Of those who responded, 48.0% revealed that they would vote for the Democrats, while 40.0% declared that they would give their vote to the Republicans. The poll was carried out from January 2 to January 7 with 1470 registered voters. The sampling error is +/-2.6 percentage points.
According to other surveys
Converting these results into two-party vote shares yields figures of 54.6% for Clinton and 45.5% for the Republican Trump. In comparison to the average results of other polls in Iowa the Democrats did worse in this poll.