Social Media and the Government

Dan Drezner has a couple posts at the Post about the future.  I commented this way on one
which included a discussion of some of the structural constraints on Trump:

You fail to note one factor not present in the past: social media.  Is the government much more permeable and transparent because of it?  Remember Nixon's tapes were secret and only revealed by accident.  Clinton's emails were hacked. Anyone with a gripe, justified or unjustified, can now find a speaking trumpet. Or does social media tend to empower the more extreme partisans, further dissolving the moderate middle?