Key quote:

Biden’s defiance against calls for him to leave the presidential campaign after last month’s debate have only worsened his chances in November, Cook Editor-in-Chief Amy Walter wrote.

“Biden was losing pre-debate. Now, he’s losing by a bit more,” she said, adding that the possibility Biden leaves the race at this point is “remote.”

Citing postdebate polling, Cook announced it will move Minnesota, New Hampshire and Nebraska’s 2nd Congressional District from “Likely Democratic” to “Lean Democratic.” The group also moved Nevada, Arizona and Georgia from “Tossup” to “Lean Republican.”