Getty Poll: Clinton's lead over Trump triples in Wisconsin

Hillary Clinton's lead over Donald Trump has tripled in Wisconsin since July, with the Democratic nominee now holding a double-digit advantage, according to a Marquette University Law School poll of likely voters released Wednesday.

Clinton leads Trump by 15 percentage points, with 52 percent support to Trump’s 37 percent support. Seven percent said they would vote for neither candidate, while 3 percent said they were undecided.

Clinton led Trump by just 4 percentage points in July before both parties convened their nominating conventions last month.

In a four-way contest including Libertarian Party nominee Gary Johnson and Green Party nominee Jill Stein, Clinton leads with 47 percent, followed by Trump at 34 percent, Johnson at 9 percent and Stein at 3 percent with 4 percent undecided and 2 percent choosing neither candidate.

Clinton’s unfavorability rating nearly equals her favorability, a relative plus for a candidate who, like Trump, has historically high negatives nationally. Her net favorability is -1 percent, (48 percent favorable, 49 percent unfavorable), while Trump’s is -37 percent (28 percent favorable, 65 percent unfavorable).

Clinton is also the candidate respondents said cares about people like them (50 percent, yes; 48 percent, no) — much more so than Trump (31 percent, yes; 66 percent, no) — and has the qualifications to be president (61 percent, yes; 38 percent, no). While voters largely share the same views on whether Clinton and Trump are honest, nearly 7-in-10 said Trump is unqualified for the White House.

In the Senate race, former Wisconsin Sen. Russ Feingold has expanded his f5-point lead over Republican incumbent Sen. Ron Johnson from July. Feingold now leads with 53 percent support to Johnson’s 42 percent support.

The Marquette University Law School survey of 683 likely voters was conducted via landline and cellphone and has a margin of error of plus or minus 5 percentage points.