The good economic news, when it comes to the ascendant Delta variant of the coronavirus, is that it puts the economy at risk in only two ways. The bad news: They are supply and demand.So far, the recovery remains robust by most available data. Real-time indicators of business activity show little evidence that Americans are pulling back their economic activity in any meaningful way.But while there is no reason to expect a repeat of the huge disruption of 2020, the new variant puts at risk the kind of rapid recovery that has been underway for months. Just as major …