The stakes for both contenders are enormous. Viewers will not only be paying attention to what is said, but how it’s said and how the candidates react to one another.
"Too often we ignored or forgot the stories of millions upon millions of others who built this nation just as surely," Obama said.
Obama said the museum, which officially opens Saturday, "tells a story of America that hasn't always taken a front seat in our national narrative.
The family of the man, Keith Lamont Scott, released cellphone video footage that Scott's wife recorded in the moments leading up to Tuesday's fatal shooting.
“We think there’s a big hidden Trump vote in this country,” said Kellyanne Conway, campaign manager for Republican presidential nominee Donald Trump, on NBC's the Today Show last month.
Obama said during his eight years as president, he has sought to transform the relationship between the U.S. and Africa to one of equal partners.
Protesters clashed with police and shut down a major highway Tuesday night and early Wednesday after Keith Lamont Scott, 43, was killed.
Police arrested Ahmad Khan Rahami, 28, on Monday after a search they said focused on him because he was spotted on surveillance video at the blast site.
Law enforcement officials said Ahmad Rahami, 28, was detained in Linden, New Jersey, late Monday morning.
New York Governor Andrew Cuomo labeled the incident an "act of terrorism" at a news conference on Sunday morning, but specified that there is no evidence of "international terrorism."
Bus and subway transportation near the scene of the blast was halted, and witnesses reported seeing large numbers of people fleeing from the scene.