Megan McArdle
Personally, I have really been enjoying the "We need to find some way to win other than by appealing to more voters or moderating on any of the more unpopular demands of the Groups" takes. But yes.
Matt Grossmann
We should not pretend there is a theoretical or empirical debate about whether parties in a 2-party system benefit electorally from ideologically placing themselves closer or further from the median voter. There are many other factors & plenty of other useful arguments.