4 year election cycles, so 10 years from now would be just after midterm elections.

For starters, there's no (planned) presidential election in 10 years. There's one in 4 years, 8 years, and 12 years

But he might be making a prediction/silly joke that Trump will destroy the US or something.

This last presidential race more or less started 2 years ago. If he were to run for President for the election in 12 years, he'd more or less start running in 10.

No I was just going by Zuck's age.

He's 32 years old, and the President has to be at least 35 years old. So he could run in 4 years.

I would not want a 35 year old Zuck as President.

there isn't a presidential election in 10 years.