A new Marquette Law School Poll released today finds that among likely voters, i.e., those who say they are certain they will vote in November, Democratic candidate Hillary Clinton is supported by 52 percent and Republican candidate Donald Trump by 37 percent. Ten percent say they will support neither candidate.

The poll is the first in Wisconsin since Clinton and Trump accepted their respective party’s nomination at the Democratic and Republican national conventions last month. In July, likely voters gave Clinton 45 percent support, Trump 41 percent and 14 percent said they would vote for neither.

In a four-way matchup including Clinton, Trump, Libertarian candidate Gary Johnson and Green Party candidate Jill Stein, Clinton is supported by 42 percent of registered voters, with Trump at 33 percent, Johnson at 10 and Stein at 4. A total of 11 percent in that match-up say they will vote for none of the candidates, won’t vote or don’t know how they will vote.

Meanwhile, in a head-to-head match-up for Wisconsin’s U.S. Senate race, among registered voters, Democratic candidate Russ Feingold is supported by 49 percent while Republican incumbent Ron Johnson receives 43 percent. In July, Feingold had 48 percent support and Johnson 41 percent.

Among likely voters in November’s election, Feingold has the support of 53 percent while Johnson is supported by 42 percent. Among likely voters in July, Feingold was supported by 49 percent and Johnson by 44 percent.

The Marquette Law School Poll is the most extensive statewide polling project in Wisconsin history. This poll interviewed 805 registered Wisconsin voters by landline or cell phone, August 4‑7. The margin of error is +/- 4.6 percentage points for the full sample. For likely voters, the unweighted sample size is 683 and weighted sample size is 619, with a margin of error of +/-5.0 percentage points.