Joe Biden is president, because the sky is blue.

It's a category error, I think.

It's like "my car won't start because apples are red".

As bo bennet said that this is non sequitur and it is just like saying "Pewdiepie is a big youtuber because ksi defeated jake paul

You use sequiturs for gardening.

(one must lighten up a bit) :)

Description: When the conclusion does not follow from the premises. In more informal reasoning, it can be when what is presented as evidence or reason is irrelevant or adds very little support to the conclusion.

This is how the website defines non sequitur 

Example:

 "People like to walk on beach, therefore walking on sand at home is a great idea" 

Of course people like to walk on sand but that doesn't mean that they want sand on homes.

And this is non sequitur because sky being blue has nothing to do with joe biden being president, because sky is always blue and it is formed by natural causes not by joe biden and Joe biden is president because he is elected by people