Every single piece of law granting the US government authority on national security grounds has enjoyed bipartisan support for a very long time. I'm only surprised it hasn't been used like this earlier.
Not really. RT and Al Jazeera has (rightfully) suffered much of the same scrutiny. There's a fundamental difference between something extremely partisan (think Breitbart or HuffPo) and something state-sponsored. Let's not bury our heads in the sand here.
Not really, free speech should apply even to hostile foreign propaganda.