Donald Trump sparks outrage over tweet in wake of Orlando shooting

ORLANDO, FL -- Donald Trump prompted outrage on Sunday after tweeting that he "appreciate(s) the congrats for being right on Islamic terrorism" in light of the deadly massacre in an Orlando nightclub.

He followed that message up with another calling for President Barack Obama to resign if he doesn't mention the words "radical Islamic terrorism."

At least 50 people died and an additional 53 people were hospitalized after a deadly shooting at a gay nightclub in Florida.

The tweet caused a firestorm online, with backlash coming quickly from other famous names both in and outside of the political arena.

Meghan McCain, the Republican commentator and daughter of Sen. John McCain, questioned the message Trump was sending.

Actor George Takei weighed in and shamed the presumptive Republican presidential nominee.

Click here for full coverage on the deadly mass shooting in Orlando.