Harris in most recent polls does better than Biden and often has a lead over Trump – at worst she and Biden had the same supporters

[Christian, 7-21-2024, The Hill, “Does Kamala Harris give Democrats a better chance to win?,” https://www.vox.com/2024-elections/361750/biden-drop-out-harris-endorse-polls-against-trump-democrats-dnc, accessed 7-21-2024, CM]

Harris backers have plenty to point to in the aftermath of June’s presidential debate.

There’s the obvious stuff: Harris is younger, can actually string sentences together, and has already been campaigning against Trump this year. These points were once again demonstrated this week — while Biden was forced to recover from Covid at his home in Delaware during the week of the Republican National Convention, Harris was on the trail with North Carolina Democratic Gov. Roy Cooper.

What the data says: First, a caveat: comparing polling of reality to a hypothetical match-up is always a bit treacherous.

What we can say from head-to-head polling of Harris is that the general trend has gotten a lot better for her. A year ago she was underperforming Biden in head-to-head polling against Trump in a variety of surveys. Closer to the debate and right after, she began to perform about evenly. And more recently, in July, a few polls comparing Biden and Harris against Trump in battleground states and nationally have shown Harris even with Biden or slightly ahead of him.

The first sign of this change came from CNN’s first post-debate poll, finding the vice president trailing Trump by 2 percentage points (within the margin of error) while Biden trailed by 6 points. And in FiveThirtyEight’s polls-only post-debate comparison of Harris and Biden vs. Trump, Harris performs slightly better than the president in battleground states — though not in all of them.

Recent polling from Pennsylvania and Virginia also shows more positive signs for the vice president: New York Times/Siena College polls this month show that while Harris still trails Trump by 1 point in Pennsylvania, that’s a smaller gap than the 3 points that put Trump ahead of Biden there. Both of these results are within the polling’s margin of error, making the race in the state essentially tied. In Virginia, meanwhile, Harris’s lead over Trump is 2 points larger than the lead Biden has over the former president.

And a post-assassination attempt national poll from Reuters/Ipsos shows a statistically tied presidential contest for either Biden or Harris against Trump.