Presumptive Democratic presidential nominee Hillary Clinton leads presumptive GOP nominee Donald Trump by 7 points in Wisconsin, according to a poll of registered voters in the state released Wednesday.

Mrs. Clinton received 42 percent support in the Marquette University Law School poll, compared to 35 percent for Mr. Trump. Seventeen percent said they wouldn’t vote for either candidate.

Among likely voters, Mrs. Clinton’s lead expanded to 9 points, with 46 percent saying they would support her, compared to 37 percent who said they would support Mr. Trump and 13 percent who said they wouldn’t support either candidate.

The survey was taken from last Thursday through Sunday. Mrs. Clinton effectively wrapped up the Democratic nomination last Tuesday, and the deadly terrorist attack in Orlando occurred early Sunday morning.

In March, Mrs. Clinton had held a 10-point, 47 percent to 37 percent, lead over Mr. Trump among registered voters in the poll. President Obama carried the state by about 7 points in 2012.

In the poll released Wednesday, 78 percent of Republicans said they are certain to vote in November — down 9 percentage points from March. Meanwhile, 84 percent of Democrats said they are certain to vote in November — up 3 percentage points from March.

“The likelihood of voting reflects both personal involvement in politics and current campaign events,” said Charles Franklin, professor of law and public policy and director of the Marquette Law School Poll.

Mr. Franklin said studies have shown the likelihood can fluctuate over the course of the campaign and only settle down once the calendar moves past Labor Day.

“However, the current data show the difficulty the Republican Party is currently facing with a sharp drop in enthusiasm for voting this November,” he said. “After the national conventions in July, as both parties attempt to unify and rally their supporters, we will have a better idea how turnout will affect the election.”

Among registered voters, Mr. Trump had a 26 percent/64 percent favorable/unfavorable split, while Mrs. Clinton had a 37 percent/58 percent favorable/unfavorable split.

Fifty-two percent of Republicans said they have a favorable view of Mr. Trump, compared to 35 percent with an unfavorable one.

Mrs. Clinton, meanwhile, had a 67 percent favorable rating among Democrats, compared to 27 percent with an unfavorable view.

Fifty-three percent reported a favorable view of Sen. Bernard Sanders of Vermont, and 36 percent said they have an unfavorable one. Among Democrats, 81 percent reported a favorable view of Mr. Sanders, compared to 10 percent with an unfavorable one.

Mr. Sanders led Mr. Trump by 25 points, 56 percent to 31 percent, among registered voters and by 24 points, 57 to 33 percent, among likely voters.

Among supporters of Mr. Sanders, 67 percent said they will vote for Mrs. Clinton, 4 percent said Mr. Trump, 24 percent said neither, and 5 percent said they were undecided.

In the U.S. Senate race, Democrat Russ Feingold led incumbent GOP Sen. Ron Johnson by 4 points among registered voters, 45 percent to 41 percent, and by 9 points among likely voters, 51 percent to 42 percent.

Mr. Feingold had held a 5-point, 47 percent to 42 percent, lead over Mr. Johnson among registered voters in March.

Sign up for Daily Newsletters Manage Newsletters

Copyright © 2020 The Washington Times, LLC. Click here for reprint permission.