Congratulations, racists. You chased out a bright young tech-loving kid and his middle-class, working, taxpaying family, because as soon as you hear the name "Ahmed Mohammed" you can't help but think "bomb-wearing fanatic."
More importantly, you made absolutely sure that he and his family knew that you think this, that this is all you expect of them, that this is the role you want them to play so that you can have an enemy -- not a dangerous enemy, of course, you don't want to face something that's actually more threatening than a suburban kid with a clock or a farmworker trying to send some cash home -- to demonstrate your manhood by defeating.
Well, you did. You beat him. His family was invited to Education City, in Doha, Qatar, where universities likes Texas A&M Qatar are ready to welcome him and his family with open arms, and they decided to leave rather than take more abuse from people like you. Not even a one-time invitation to the White House could keep away the persistent hatred you were spewing at the Mohammed family.
Racism costs America in a million and one little ways every single day, of course. It's just this time the dots were right there to connect.