Three swing states go from leaning GOP to "toss up": Cook Political Report

• These new electoral college ratings follow recent CBS polling that shows Trump and Harris are tied across collective battleground states as the Democratic ticket continues to eat away at Trump's lead over a pre-bow-out Biden.

Driving the news: The Cook Political Report announced changes to its electoral college ratings Thursday, reclassifying Arizona, Nevada and Georgia as toss-up states.

• Biden won each by a narrow margin in 2020.
• CPR had moved Arizona, Georgia and Nevada from "toss up" to "lean Republican" last month as Biden resisted calls from his own party to exit the the race.

What they're saying: Three weeks ago, CPR's Amy Walter wrote, Trump led Biden in Cook's national vote tracker by around 2.5%. Now, by their measure, Harris is leading Trump by "less than one point."

• "Battleground state polls are showing similar results, with Harris cutting into Trump's lead by anywhere from two to five points," Walter said.
• "Things look a lot better for Democrats today than they did a few weeks ago, but Trump is looking stronger now than he did in 2020," Walter said. "This is a Toss Up."

Zoom in: Rachel Reisner, Republican National Committee director of regional communications and battleground states, said in a statement to Axios that swing-state voters will rally around Trump over "kitchen table issues."

• "Swing state voters overwhelmingly trust President Trump over Kamala Harris on the economy, inflation, and the border crisis -- and it's why voters will flock to the Republican ticket this fall," she said.

• Karoline Leavitt, a Trump campaign spokesperson, said in a statement to Axios: "As more voters understand how dangerously liberal Kamala Harris is, President Trump's chances in these battleground states will only get better."

The big picture: Pennsylvania is considered the most hotly contested state, as both campaigns are on track to spend more than double on advertising there compared to any of the other swing states, according to Axios' analysis of AdImpact data.

• The Keystone State and its 19 electoral votes are also classified as a "toss up" per Cook's current ratings, along with Arizona, Georgia, Michigan, Nevada, Pennsylvania and Wisconsin.
• North Carolina remains classified as leaning Republican, per CPR.

Go deeper: Kamala Harris' new challenge: translating momentum into votes

Editor's note: This story has been updated with an additional statement.