He's a moderate libertarian. Several people who have already stated that they don't want the LP do do well (and who are voting for Trump) have thrown a fit because Weld isn't a "hardcore libertarian" enough to be a fugitive running from Belize (as if that would do well in the political arena). They clearly want the LP to remain fringe.
But the fact of the matter is, Weld ran on the LP in New York as early as 2006, well before any of these folks were registered on RPF, and long before many of them had heard of the LP. He risked his own political future for the Libertarian Party, and of course paid the price, because the LP has difficulty getting anyone elected.
Here's how he ranks overall:
There already is one.