CNN poll: Trump narrows gap with Biden

According to a new CNN poll conducted by SSRS, Joe Biden's lead over Donald Trump among registered voters has significantly narrowed since June, Report says.  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 mostly 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 four 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%. However, it is narrower 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.