Jon Lieber, who leads Eurasia Group's coverage of political and policy developments in Washington, offers insights on yesterday's turmoil at the US Capitol:

What we saw yesterday in the Capitol Building in Washington, D.C. was completely without precedent in United States political history. And just on a personal note, it was really upsetting to see people wandering around the halls of Congress and disrespecting the building. And fundamentally, this was a failure of policing at some level, and the Capitol Police will be expected to be held accountable for that in the coming weeks. And what you saw yesterday was not in any way equivalent to but is on the same spectrum as a lot of the same political protests that we've seen over the last couple of years, starting with the invasion of the Capitol complex during the Kavanaugh confirmations, and extending to the riots and protests that we saw over the summer, including the takeover of several blocks of downtown Seattle. This is obviously, what happened yesterday, far beyond the pale of any of those things. And it is no way their equivalent, but what all of this reflects is a failure of the democratic process to resolve differences in the United States. And that's a function of the deep polarization that you've seen, both because of geographic sorting, and atomization of the media that's allowing people to live in their own bubbles and give political figures strong incentives to disagree, as opposed to coming to agreements.