The above photo was Tweeted by Donald Trump on 4th of July. Some UFO entusiasts have drawn attention to the glowing orbs visible in the top of the image
However, these are simply internal lens reflections of the stage lights below. Here I've increased the contrast a little to make the lights stand out. The patterns match exactly. Click for larger image.
This is a very common type of "UFO" sighting that has been explained many times before. But people still want to be true.