[Steely Tom]

Prior to his speech, hundreds of people gathered for hours outside the Convention Center in downtown Phoenix to either support the President's visit or rally against it, which remained mostly peaceful.

I guess it remained mostly peaceful until it didn't remain mostly peaceful.

How many gathered inside the Convention Center? Were they showing support for the President's visit?

[Parley Baer]

Hundreds? Around 20,000 inside and another 2000 or so outside for Trump.

Estimate of up to 2000 protestors.