Trump V Pope

US Republican candidate Donald Trump is used to having critics - in fact, he thrives on it. Image: Republican presidential candidate Donald Trump (AAP)

But now he's being challenged by none other than The Pope.

 

The Catholic pontiff says Mr Trump cannot claim to be Christian while vowing to build a wall on the US-Mexico border.

 

And as this report shows, it's drawn an angry response from the billionaire tycoon.