Data for Progress polled Michigan, Pennsylvania, and Wisconsin a month ago and again last week.
The first poll was just before Joe Biden dropped his re-election bid and Donald Trump led Kamala Harris in these battleground states by 7 percentage points (and Biden by 6 percentage points).
The second poll last week found Harris now leads Trump by 1 percentage point.
Key takeaway: “Overall, the results suggest that Democrats have a chance to reclaim the narrative going into the final months of the election campaign. Harris has made important improvements in terms of her favorability ratings and has a narrow lead over Trump in the Rust Belt collectively. The presidential race once again appears to be a true tossup.”
