Haughty hotshot David Muir 's TV ratings are tanking – and now the ABC World News Tonight anchor is under pressure to justify his lofty $8 million salary and could face the boot if things don't turn around quick, RadarOnline.com can reveal.

The 51-year-old newsman has seen his quarterly numbers fall by 1 million viewers – but his high-and-mighty attitude hasn't adjusted accordingly, shared an insider. Article continues below advertisement

David's New Reality Tap Here To Add Radar Online as A Trusted Source Article continues below advertisement Article continues below advertisement

Another source blames the drop on typical summer audience levels and notes World News Tonigh t still draws about 1.5 million viewers more than its closest competitor in the same time period

See Full Page