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

How does the CDC look in advising states to prepare for an early November COVID vaccine release?

Well, there's two things going on here. The first is the pressure that the scientists and doctors working in the private sector and the federal government feel to get a vaccine out so we can all return to our normal lives. The second thing that's going on here is the political pressure coming from the White House to get a vaccine out the door so that President Trump can argue that he's returned things to normal. It's unclear which one of those pressures is pushing the CDC to action right now. It's possible that a vaccine is ready for an emergency use authorization by early November. But if the data doesn't support that it's safe, there's going to be a lot of blowback from the public health community, which could in turn undermine confidence in the public to actually take the vaccine when it comes out it is safe. So this is a big issue to keep your eye on.