Strange that the alt-Right and the Tea Party each gained such prominence within just several years of each other–beyond a common antipathy to illegal immigration, they have very little in common.
The policy goals of the alt-Right seem to have more in common with the neo-cons of the early 2000s than they do with constitutional conservatives. Consider the current popularity of trade protectionism and the zeal for interventionism, for example.
Is there a relationship between the decline of the Tea Party and the rise of the alt-Right?
[Here is a great discussion of the alt-Right, particularly what Latter-day Saints should do about it. A couple of remarks from yours truly are part of a great discussion in the comments.]