Support for President Trump has dipped below 40 percent in a trio of key states - Pennsylvania, Wisconsin and MI - which propelled him to the White House in 2016.
The survey results showed a marked difference in the general opinion of the three states since the November election, when Trump became the first GOP candidate to take the three states since the 1980s.
Wisconsin: 56 percent disapprove, including 42 percent strongly, compared to 34 percent approval (17 percent strongly).
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Three polls were conducted in Michigan, Wisconsin and Pennsylvania this past week following last weekend's violence in Charlottesville, Virginia.
Sixty-four percent of voters in MI and Wisconsin said they are "embarrassed" by his behavior, while 63 percent in Pennsylvania say they are.
According to the poll that was released Thursday, Trump's approval rating increased to 39 percent from a record low of 33 percent in part due to optimism on the economy.
NBC surveyed 795 voters in MI, 773 in Pennsylvania, and 801 voters in Wisconsin from August 13 through August 17. MI voters by a 42-to-39 percent margin said the USA economy has strengthened thanks to Trump's decisions.
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Asked if Trump's conduct as president made them proud or embarrassed them, 64 percent of voters in MI and Wisconsin say they've been embarrassed, while 63 percent say that in Pennsylvania. In Pennsylvania, it's 45 percent to 38 percent.
In Michigan, Trump counts on the strong approval of 19% of voters. In Wisconsin, Democrats were favored with 46 percent.
Collectively, 62 percent of the 1,099 respondents polled agreed the president "decisions overall have weakened the role of the United States on the world stage".
The poll of registered voters in each state has a margin for errors of 3.5 percent. In Pennsylvania, Democrats led with 47 percent.
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The president's reaction to the violence was widely criticized after he placed blame for the violence on "both sides" and appeared to suggest there were people on the white supremacist march who were neither neo-Nazis nor white supremacists.