was Obama an atheist?

Politics is his religion, as it is for all high office politicians.  They simply sold their souls in favor of fame and fortune, and not a rarity in many walks of life.

No.  Obama is Christian, and goes to a Christian church.

I am not sure what Trump is.

Only a clueless idiot or a little child troll would ask this question. Which one are you?

There's no real evidence that Obama was an atheist. He has been a regular attendee at church services his entire adult life.

Both of them claimed to be Christian to appeal to the superstitious proles.

Sure.  All atheists attend church every Sunday for decades like Obama did. 

And trump is about as far from being a christian as the Ayatolla is 

I don't know.  

He certainly did follow Christ's teachings to help and heal people far more than any Republican, especially that orange shitsmear.

Trump was no christian.  He said in an interview that he had no reason to repent because he did nothing wrong.

Hopefully not...

Anybody who wants to be president of the USA has to at least pretend to be a Christian.  I think that Obama did a much better job of that than Trump did.