With the usual caveat about polls...

Via Taniel:

Quinnipiac has 3 new polls of Blue Wall states:

—MI: #Harris up 50/45
Slotkin up 51/46

—PA: Harris up 51/45
Casey up 52/43

—WI: Harris up 48/47
Baldwin up 51/47

Trendlines: QPac last polled PA in Aug (Harris 50/47), WI in May (Biden 50/44), & MI in Mar (Trump 48/45).

https://poll.qu.edu/poll-release?releaseid=3905

Swing State Poll 2024: Pennsylvania, Michigan, Wisconsin: Harris Ahead In 2 Key Battleground States, 3rd State Up For Grabs, Quinnipiac University Poll Finds; U.S. Senate Races: Democrats Have Leads In All 3 States | Quinnipiac University Poll

"Three crucial swing states wave a red flag at the Trump campaign. The GOP's most 'go to' attack strategies against Democrats on immigration and the economy may be losing momentum.

^poll.qu.edu