Denver police commander tells protesters they can't carry a copy of the constitution.

[Ms. Toad]

8. The person speaking was male,

The poster was being held by a woman. So I don't know what he was carrying.

But even assuming it was the same poster, the poster itself was not disruptive. Unless there is a uniformly enforced prohibition on carrying signs with visible writing (like, say, the signs seen very frequently in airports, held up to help people find their rides) they create a ban or selectively enforce one against carrying signs against political speech (the most protected speech).