WATCH: Angry John Oliver blisters 'f*cking a**hole' Donald Trump for his comments on Khan family

On HBO's Last Week Tonight, an emotional and angry John Oliver wrapped up his comparison of the Republican and Democratic national conventions with a withering commentary on GOP nominee Donald Trump's smear of the family of a war hero.

Going where regular cable pundits won't or can't go, the HBO host cut right to chase by addressing Trump as: "you f*cking asshole."

After showing clips of Trump speaking with ABC's George Stephanopoulos, where he appeared to make it seem that Ghazala Khan -- the grieving mother of war hero Capt. Humayun Khan -- was afraid to speak in front of her husband due to the family's religious beliefs, Oliver unloaded on Trump.

"Okay," Oliver began, "For a start, his wife has explained that she chose not to speak because she gets too upset when she sees images of her dead son's face, you f*cking asshole. But, I'm sorry, please continue."

After running a clip of Trump he made while building up his businesses to the loss of Khan's son, Oliver had enough.

"No. No they absolutely are not" Oliver railed. "They are half-truths from a self-serving half-man who has somehow convinced half the country that sacrifice is the same thing as success."

"Honestly, the main take-away from these two weeks is that, incredibly, we may be on the brink of electing such a damaged, sociopathic narcissist, that the simple presidential duty of comforting the families of fallen soldiers mat actually be beyond his capabilities," Oliver exclaimed. "And I genuinely did not think that was the part of the job that someone could be bad at."

Watch the video below, via YouTube: