We have gone through a presidency that disregarded a whole host of basic institutional norms.

What we've seen is what some people call truth decay, something that's been accelerated by outgoing President Trump,

this sense that not only do we not have to tell the truth, but the truth doesn't even matter.

Tonight, President Barack Obama on the state of our nation, and insights from a new memoir about his own presidency.

And I ask myself in the book, how much of this is just megalomania, how much of this is vanity, how much of this is me trying to prove something to myself.

Unless you've been living under a rock, you've probably heard of TikTok.

Here's the problem with TikTok as it exists now.

It is owned by a Chinese parent company that has direct ties to the Chinese Communist Party.

And we also know that under Chinese law,

TikTok, bite dance, the parent,

is required to share data with the Chinese Communist Party.

Required.

Required to under Chinese law.

American users, parents, teenagers,

that have no way of knowing about any of this.

I'm Leslie Stahl.

I'm Bill Whitaker.

I'm Anderson Cooper.

I'm Scott Pelly.

Those stories and more tonight on 60 Minutes.

On election night, 2016, then-President Barack Obama called Donald Trump at about 3 o'clock in the morning to congratulate him, even though Mr. Trump had lost the popular vote and took the electoral college by less than 1% in three states. Today, President Trump declines to accept the verdict of the voters, despite

losing by greater margins to President-elect Joe Biden. Mr. Obama hasn't spoken of the election

...