Donald Trump has made a sizable cut into Hillary Clinton’s lead in Michigan, a state that is rich in electoral votes (16) but hasn’t gone GOP in a presidential election since 1988.

Trump is now just 3 points behind his Democratic rival in the state, marking a shift in the polls since last month when Clinton enjoyed an 11-point lead, according to the poll by Lansing-based EPIC-MRA for the Free Press, WXYZ-TV (Channel 7), and their partners. Clinton’s lead, 38 percent to Trump’s 35 percent, falls within the poll’s 4-percent margin of error.

“It may be a function of the timing … [but] there has been a shift toward Trump.”

In 2012, President Obama defeated GOP presidential nominee Mitt Romney by nearly 10 points in the Great Lakes State.

The spike in voter support for the Republican nominee comes after a week of Clinton gaffes. The EPIC-MRA poll surveyed 600 likely voters from Sept. 10 through Sept. 13, within the timeframe that Clinton called “half” of Trump backers “deplorables” who are “racist, sexist, homophobic, xenophobic, Islamophobic,” and collapsed at a 9/11 memorial service.

Trump also gained support in another Rust bBelt states, including Ohio, which voted for Barack Obama in the past two elections and is worth 18 electoral votes.

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In Ohio, Clinton is behind Trump 5 percent in both the head-to-head matchup and the four-way race, according to a new Bloomberg Politics poll released Wednesday.

Though Clinton once enjoyed a post-Democratic convention bump in the polls, a recent wave of voters across the nation are turning to Trump.

“It may be a function of the timing of the survey and her health questions, [but] there has been a shift toward Trump. Whether it’s going to be a permanent shift is yet to be determined,” EPIC-MRA’s pollster Bernie Porn said, according to Detroit Free Press.