Democratic nominee Joe Biden holds a narrow edge in the key battleground state of Wisconsin, while President Donald Trump’s disapproval rating in the state is at 52%, new polls indicate.

A Washington Post-ABC News poll showed Biden leading Trump, 52%-46% among likely voters, and 50%-46% among all registered voters. There is a 4.5-point margin of error among likely voters.

Trump recently visited Wisconsin to highlight his support for law enforcement and to emphasize he can calm recent unrest. Biden has also visited the state, meeting with the Blake family. The former vice president called for unity while denouncing the violence that followed the shooting.

The Washington Post-ABC News poll showed Trump and Biden tied on the question of whom state voters trust more on issues of crime and safety.

Marginally more voters say they trust Biden over Trump on discouraging violence at political protests, though the difference is not statistically significant, the Post reported.

Trump won Wisconsin by less than a percentage point in 2016. The victory was considered a major upset after Democrats had consistently won the state in recent presidential elections.

Biden has led in recent state polls. According to poll aggregator Real Clear Politics, the last 15 polls show Biden with at least a 4-point lead.

Biden leads among white men with college degrees, 56%-42%, and among white women with college degrees by an even larger margin, 65%-35%. Biden has a slight edge among white women without college degrees, 54%-45%, while Trump leads 65% to 32% among white men without college degrees.

Meanwhile, Trump’s national approval ratings have barely moved. The latest Gallup poll shows Trump at a 42% approval rating, which is roughly where he was in January 2017. He remains well short of the 50% threshold that incumbents usually enjoy before an election.

The Gallup poll, which showed Trump's disapproval rating at 56%, surveyed 1,019 adults from Aug. 31-Sept. 13 and has a margin of error of 4 points.