I think part of the message-control in this case is to hype youth votes for November’s election. They might be able (at least within Florida) to flip five GOP ‘safe’ seats over to the Democrats. Nationally, you might be looking at 15 GOP seats being flipped....all because youth-voters showing up and voting Democrat.
According to this article most youth don’t agree with Hogg and friends. And how many youth were at the big rally? And millennials don’t vote.