Biden and Trump matchup tightens as enthusiasm hits new high

Joe Biden’s lead over Donald Trump among registered voters has significantly narrowed since June, according to a new CNN poll conducted by SSRS, even as the former vice president maintains an advantage over the President on several top issues and his choice of California Sen. Kamala Harris as a running mate earns largely positive reviews.
And on the eve of the party conventions, a majority of voters (53%) are “extremely enthusiastic” about voting in this year’s election, a new high in CNN polling in presidential election cycles back to 2003.
Overall, 50% of registered voters back the Biden-Harris ticket, while 46% say they support Trump and Pence, right at the poll’s margin of error of plus or minus 4 percentage points. Among the 72% of voters who say they are either extremely or very enthusiastic about voting this fall, Biden’s advantage over Trump widens to 53% to 46%. It is narrower, however, among those voters who live in the states that will have the most impact on the electoral college this fall.
Across 15 battleground states, the survey finds Biden has the backing of 49% of registered voters, while Trump lands at 48%.
The pool of battleground states in this poll includes more that Trump carried in 2016 (10) than were won by Hillary Clinton (5), reflecting the reality that the President’s campaign is more on defense than offense across the states. Taken together, though, they represent a more Republican-leaning playing field than the nation as a whole.
The movement in the poll among voters nationwide since June is concentrated among men (they split about evenly in June, but now 56% back Trump, 40% Biden), those between the ages of 35 and 64 (they tilt toward Trump now, but were Biden-leaning in June) and independents (in June, Biden held a 52% to 41% lead, but now it’s a near even 46% Biden to 45% Trump divide).
Trump has also solidified his partisans since June. While 8% of Republicans or Republican-leaning independents in June said they would back Biden, that figure now stands at just 4%. And the President has boosted his backing among conservatives from 76% to 85%.
But the survey suggests that Trump’s voters are a bit more likely to say that they could change their minds by November (12% say so) than are Biden’s backers (7%).