Most up to date polling: if you watch John King’s analysis here, Kamala’s momentum is continuing, the race is tight, but she has more pathways to victory than he does:
https://www.cnn.com/2024/09/04/politics/video/polling-data-close-race-john-king-ebof-digvid
In simple terms: Pennsylvania is tied. Trump needs it to win. Kamala does not; she can still win with Nevada and Georgia. She’s ahead in both places. (And that’s also conceding North Carolina to Trump which is no sure thing.)