The key lesson from the Senator Rubio drinking water is that for conservatives Old Media is an implacable enemy and will drive the most trivial stories if its politically apt1. Conservative politicians need to learn that you might as well be hung for a wolf as a sheep and not even try to appease the political hacks who comprise Old Media.
P.S. I must note the incredible gullibility of Old Media when the story is channeled by The Narrative. Just recently we have the Sarah Palin joins Al-Jazeera and now the flagrant misquote of Rand Paul. It’s not that mistakes are made, its that no effort to verify is done.
1 Just contrast coverage of Senators Rubio and Menendez vs. the severity of the underlying scandal.