Four new national polls conducted nearly entirely after last week’s Republican National Convention indicate Democratic presidential nominee Joe Biden holding an upper-single-digit lead over President Trump.

But an average of all national surveys in the White House race shows a slight narrowing in the showdown between the former vice president and the Republican incumbent.

According to a USA TODAY/Suffolk University poll released Wednesday, Biden tops Trump 50-43% among registered voters nationwide. The former vice president's seven-point advantage is down from a 12-point lead he held in the previous USA TODAY/Suffolk University survey, which was conducted in June. The new poll was conducted Aug. 28-31, entirely after the GOP convention.

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If the election were held today, a Grinnell College national poll also released on Wednesday shows Biden ahead of Trump 49%-41% among likely voters nationwide. The survey was conducted Aug. 26-30 – both during and after the Republican confab – by Selzer and Company.

A new Quinnipac University national poll indicates Biden topping Trump by a 10-point 52%-42% margin among likely voters.

That's down from a 15 point lead that Biden held among registered voters in Quinnipiac's previous national survey, which was in the field in early July.

The new poll was conducted Aug. 28-31, entirely after the GOP convention.

And a new CNN/SSRS poll conducted August 28-Sept. 1, entirely after the Republican confab, showed Biden with a 51%-43% lead over the president among registered voters nationwide.

Biden's margin was actually up from a 4-point edge he held in CNN's previous survey, wihich was conducted in mid-August, ahead of the start of the Democratic convention.

An average of all the most recent national polls in the Biden-Trump race compiled by Real Clear Politics indicates Biden up by 7.5 points (49.7%-42.2%). That’s a slight decrease from the 7.8 point lead Biden held in the Real Clear Politics average (50-1%-42.3%) on Aug. 24, at the start of the GOP convention.

But the race for the White House is not based on the national popular vote. If it were, 2016 Democratic nominee Hillary Clinton would be the president right now. Instead, the presidential election is a battle for the states and their electoral votes.

According to the latest polling, Biden retains the edge in most of the key general election battleground states, but his advantage is narrowing.

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In Florida, the largest of the key swing states, Biden holds a 3.7-point edge over Trump, according to an average of the latest surveys in the state compiled by Real Clear Politics. Biden’s up by 2.6 points in Wisconsin, 4.7 points in Pennsylvania, 3.5 points in Wisconsin, 2.2 points in Arizona, and 5.3 points in Minnesota. The president holds a 1-point edge in North Carolina and 1.3 points in Georgia.

Four years ago on this date, Clinton held a 4.2-point advantage over Trump. The race tightened and Clinton ended up topping Trump in the national popular vote by 2%. But Trump narrowly edged Clinton in the key battlegrounds of Florida, Michigan, Pennsylvania and Wisconsin, flipping all four from blue to red, to capture the White House.

Suffolk University political research center director David Paleologos told Fox News that – with two months until Election Day but some early voting and absentee voting getting underway this month – "nationally, the race is closing with so many unknowns yet to be determined like a COVID vaccine, racial protests and the state of the economy. Seven key states could determine this outcome."

According to the new Grinnell College survey, Biden tops Trump 56%-34% among women and 64%-31% among suburban women. With an eye to female and suburban voters, the president the past two weeks has repeatedly highlighted his law and order approach to the unrest and outbreaks of violence amid nationwide protests over police brutality against minorities and racial injustice.

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Biden also holds wide advantages among nonwhite voters and those who live in large metropolitan areas.

“Beyond the overall eight-point advantage, this poll shows some areas of underlying strength for the former Vice President,” pollster J. Ann Selzer highlighted. “Mr. Biden holds a wide lead with moderates 55-33%, who are a plurality of the electorate; he benefits from a 10-point lead among independents who do not lean toward any political party, 44-34%.”

The poll shows that the president holds a better than 2-to-1 advantage among white men without a college degree (64-31%) and is ahead with white women without a college degree (52-43%). Trump also dominates with rural voters (58-36%) and evangelicals (63-27%).

Fifty percent of likely voters questioned in the Quinnipiac national poll said having Trump at president makes them feel less safe, with 35% saying it makes them feel more safe. But a 42%-40% margin, those surveyed said having Biden as president would make them feel more safe than less safe.

"While the president has been pushing the issue of safety to the center of the presidential campaign, it raises the question: Who most has your back, the current administration, or the challengers? As racial strife, a seemingly endless pandemic, and an economy on life support unnerve Americans, voters foresee a more reliable lifeline in the Biden Harris ticket," Quinnipiac University polling analyst Tim Malloy spotlighted.

The USA Today/Suffolk survey points to significant skepticism about whether the presidential election results can be trusted. If their candidate loses, roughly one in four voters questioned say they aren't prepared to accept the outcome as fair and accurate.

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After months of the president claiming that voting by mail will lead to fraud and a rigged election, the poll finds that 83% of Republicans say they are at least somewhat concerned that mail-in voting will lead to voter fraud. Only a third of Democrats share those concerns.

Fifty-six percent of Republicans say they’ll vote in person on Election Day, compared to 26% among Democrats. The poll indicates that Democrats are more than twice as likely than Republicans to vote by absentee ballot or mail.