We haven't.
For a start I never used that phrase anywhere, for a follow-up I'm pointing out very specifically that it's a public place and not "his" podium (you literally underlined it) and for the clincher I was talking about Bernie Sanders. That's why Bernie Sanders' name appears at the start of the paragraph, in the previous sentence and I refer to his track record on equal rights running back fifty years. You underlined all of that...It is. First Amendment.
The great thing about the First Amendment is that it's an embodiment of the phrase about opening one's mouth and removing all doubt. We got to see a pair of ludicrous buttpipes threaten, intimidate and bully some people who they don't know are on their side into having their say, which was itself utterly moronic. Now we all know that Black Lives Matter in Seattle is a howling pack of nobgobblers.
And Bernie got to show that he thinks the First Amendment is more important than he is - a good quality to have for someone going for the job of defending the Constitution. Some say that shows he's weak and will be weak in foreign negotiations, but the First Amendment and indeed the rest of the Constitution applies only to the USA and its citizens. This may be a Democrat that knows his limits and won't, for a rough example, order drone strikes on teenagers from Denver.Whatever Mr. Ramos is or isn't in addition to being an actual journalist, Trump still had a journalist physically removed from a press conference.
So, to reiterate...
Trump threw a journalist out of a press conference - the concept of the press conference itself being a way to control media (as mentioned in earlier posts) - which should tell you what this prospective defender of the Constitution thinks about what freedom the press should have (though as he isn't the Federal government yet, him doing so isn't contrary to the First Amendment).
Sanders allowed some people who were quite demonstrably utter morons to exercise freedom of speech in a public place. That should tell you what this prospective defender of the Constitution thinks about what freedom of speech there should be.
And to literally reiterate:
And for reference, I'd be classed as a Libertarian - that's fiscally Conservative and socially Liberal.