UPDATE Jan. 11, 2017 at 7:04 a.m.
Many people watching Obama's speech wondered why his daughter Sasha wasn't in the audience. #WhereIsSasha trended on Twitter overnight.
She had to skip her father's farewell address because she had to study for an exam at school on Wednesday, CBS News reports.
Where was Sasha? WH Official says she stayed back in DC tonight because she has an exam at school tomorrow morning.— Mark Knoller (@markknoller) January 11, 2017
Here's the initial tweet from CBS reporter Mark Knoller.
But confusion reigned for hours.
Even after that news, some wondered what teachers wouldn't delay the exam for Sasha.
UPDATE: Jan. 10, 2017 at 9:54 p.m.
To his daughters, Malia and Sasha, Obama said, "Of all that I have done in my life, I’m most proud to be your dad."
Beyond that, he thanked his friend, and "brother," Vice President Joe Biden.
UPDATE: Jan. 10, 2017 at 9:45 p.m.
President Obama teared up as he paid tribute to his wife, First Lady Michelle Obama.
"Michelle, for the past 25 years, you've been not only my wife and mother of my children but my best friend," he said.
UPDATE: Jan. 10, 2017 at 9:36 p.m.
"When voting rates are among the lowest of advanced democracies, we should be making it easier, not harder to vote," Obama said, encouraging Americans to embrace the power of their citizenship.
"We the people give it power," he continued.
He called on Americans to be "guardians" of our democracy, encouraging people to take a stand and make an impact daily.
If you're tired of arguing with strangers on the internet, try talking with them in real life.
UPDATE: Jan. 10, 2017 at 9:29 p.m.
The president said despite attacks on the U.S. homeland, law enforcement has made great strides in the past eight years to protect our way of life.
"Our law enforcement agencies are more effective and vigilant than ever. We’ve taken out tens of thousands of terrorists," Obama said.
UPDATE: Jan. 10, 2017 at 9:23 p.m.
Obama invoked Harper Lee's fictional character Atticus Finch in the book "To Kill A Mockingbird." In the book, Finch says, "You never really understand a person until you consider things from his point of view ... until you climb into his skin and walk around in it."
UPDATE: Jan. 10, 2017 at 9:18 p.m.
Obama reemphasized that his administration is committed to ensuring President-elect Donald Trump has a smooth transition into office.
UPDATE: Jan. 10, 2017 at 9:11 p.m.
Obama highlighted his administration's achievements in terms of national security, healthcare for all citizens and equal rights for all, among other things.
"America is a better, stronger place than it was when we started," Obama said.
In response to Republican threats to repeal the Affordable Care Act, Obama said he would publicly support another plan if it proves to be "demonstrably better."
UPDATE: Jan. 10, 2017 at 9:00 p.m.
Obama borrowed from the words Thomas Jefferson wrote in the Declaration of Independence
“This is the great gift our founders gave us," Obama said. "The freedom to chase our individual dreams through our sweat, toil, and imagination and the imperative to strive together as well, to achieve a greater good.”
He emphasized that those words have given purpose to the past and future generations.
As Obama began his speech, the crowd chanted "four more years!"
President Barack Obama will break tradition Tuesday night, opting to deliver his farewell address in his adopted hometown of Chicago rather than in the nation's capital.
Based on the excerpts of his farewell address, released by the White House, Obama will point to how his time in Chicago impacted his life and influenced his time in office.
“I first came to Chicago when I was in my early twenties, still trying to figure out who I was; still searching for a purpose to my life," he will say in the address.
In his speech, he will continue to reflect on his time working as a community organizer in Chicago.
"This is where I learned that change only happens when ordinary people get involved, get engaged, and come together to demand it,” Obama will say in an address from McCormick Place convention center in Chicago.
White House Press Secretary Josh Earnest told ABC News the speech will "briefly" touch on the accomplishments of his administration, but will focus more on what lies ahead.