Donald Trump was walking through Manhattan and saw a long queue. Wondering what it was for, he joined it.

People would look over their shoulder, see that it was Donald Trump behind them,  say "oh,  thank you"  and leave the queue, so he would proceed closer and closer to the front.

As he was getting closer to the head of the queue, he asked one guy, who also looked, thanked him and was about to walk away, "Wait a second, what is this queue for and why are you now leaving it?"

The man said "This is the queue for Canadian Immigration Visas, but if you are getting one, I don't need one now."