Jon Lieber, head of Eurasia Group's coverage of political and policy developments in Washington, DC, shares his perspective on US politics.

What's going on with the Biden State of the Union?

So big week in US presidential politics. Super Tuesday basically effectively ended both primaries for the Republicans and the Democrats. We now have two all but official candidates. Joe Biden gave his fourth State of the Union address this week. Big question around Joe Biden, is he up to the task? 75% of Americans say that he is too old to run for a second term, but he is a attempting to prove them wrong like he did last night in Washington with a vigorous speech where he spoke for an hour, which officially kicked off his campaign.