Um, if SD or any other solid red state goes for Biden, then civilization as we know it is dead. I haven’t voted R or D for president most of my adult life.
I will make the assumption that a principled libertarian voter would rarely vote for a democrat candidate, especially Hillary Clinton.
In the 2016 election in Colorado, Hillary won with 1,208,095 votes over Trump’s 1,136,354 - a margin of 71,741 votes.
Gary Johnson garnered 129,128 votes.
Congratulations principled Libertarians. You turned Colorado blue.
Johnson’s vote count also exceeded the margin in Florida (won by Trump), Maine (won by Clinton), Michigan (won by Trump), Minnesota (won by Clinton), Nevada (won by Clinton), New Hampshire (won by Clinton), New Mexico (won by Clinton), Pennsylvania (won by Trump), and Wisconsin (won by Trump).
Six states could arguably have voted for Trump if not for principled libertarian voters voting for a candidate that had zero chance of winning.
Sorry but I’ve lost my patience with libertarians as a party.