Donald Trump has jumped ahead of Hillary Clinton by 4 percentage points, the first time he has led her in a national poll since 38 days ago.
The poll of 1,000 likely voters from Rasmussen Reports found that 43 per cent would vote for Trump if the November election were held today, compared with 39 per cent for Clinton.
That represents a 9-point swing in just the last week: Seven days ago the same pollsters reported that Clinton was leading the presidential race by 5 points.
The survey, which was the first conducted in the state since Trump and Clinton became their respective party's presumptive nominees, shows Clinton polling at 48 percent and Trump at 34 percent.
When put up against libertarian candidate Gary Johnson and Green Party candidate Jill Stein, Clinton still comes out on top. Clinton polled at 44 percent in that scenario, compared to Trump at 31 percent, Johnson at six percent and Stein at two percent.
This survey also comes after a string of bad polls for Trump, both in swing states and nationally. A Quinnipiac University poll earlier this month found Clinton 8 points ahead in Florida and a Ballotpedia survey released Wednesday found Clinton ahead in seven swing states.
But both candidates also had low favorability ratings in Iowa, although Trump's was much lower at a net unfavorability of 41 to Clinton's net unfavorability of 12, the poll found.
“With these kind of unfavorable ratings and levels of dissatisfaction, I think many Iowa voters may be holding their noses as they fill out their ballots in November,” Associate Professor of Politics and Director of the Loras College Poll Christopher Budzisz said in a release.
That attitude was echoed when the poll asked about voters' satisfaction with the choices for president in general. Only 17.5 percent said they were very satisfied with their options, 18.7 percent said they were somewhat satisfied, 32.7 percent said they were very dissatisfied and 27.7 percent said they were somewhat dissatisfied.
The Loras College poll was conducted by telephone among 600 likely voters between June 24-28. The margin of error was four percentage points.