DETROIT, MI - AUGUST 8: Republican presidential candidate Donald Trump delivers an economic policy address detailing his economic plan at the Detroit Economic Club August 8, 2016 in Detroit Michigan. Donald Trump is expected to attend a fundraiser in Canton, OH later today. (Photo by Bill Pugliano/Getty Images)

DETROIT (WWJ) Republican presidential candidate Donald Trump has stumped repeatedly at large events in the city of Detroit, including a much-publicized visit to a church, in an attempt to reach the city’s black voters.

The net result?

As Trump visits metro Detroit again Friday, a new WDIV poll shows him with zero support — literally — inside the city of Detroit.

And that’s not new. The Republican candidate also polled at zero percent among Pennsylvania and Ohio black voters over the summer, according to an NBC poll.

Democratic candidate Hillary Clinton polled with 89.7 percent support among Detroit voters. The poll surveyed 600 likely voters across Michigan, though far fewer of those respondents lived in the city. Overall, the survey found 7.7 percent of voters were still undecided.

[MORE: Trump: We’re Going To Win Michigan’]

Trump did lead Clinton, per the poll, in Macomb County and in northern Michigan.

Overall, the poll found the recent debate pushed Hillary to a 7 percent lead in Michigan. Trump, many watchers said, stumbled into shaky territory with African Americans when he defended “stop and frisk” policies that have been criticized as leading to racial profiling. Democrats, and the Clintons in particular, are traditionally favorites of African American voters.

About 700,000 people live in Detroit, 84 percent of whom are black; It’s the most populous city in Michigan, which has about 10 million residents, 22 percent of whom are black.

Trump is in Michigan today, but staying in mostly white suburban communities.

“(His visit) underscores that Michigan still is a battleground state,” said WWJ Lansing Bureau Chief Tim Skubick. “Of course, he wants to win Michigan.”

Other polls have Trump following Clinton by five points in Michigan. More polling is expected later this week, Skubick said.

Trump will attend fundraisers in Grand Rapids ahead of his 5 p.m. GOP rally at the Suburban Collection Showplace in Novi. Clinton has her daughter, Chelsea, campaigning on her behalf today in Traverse City.