Name a third party candidate that has ever won a US presidential election since the party system came about?
None! But, the biggest reason that is true is because too many boohoo the fact that no 3rd party candidate has ever won...imagine what would happen if all those that refuse to vote for a 3rd party candidate because they "never win" actually voted for them, that would all change. The 2nd biggest obstacle is all the losers with 'battered woman' syndrome who keep voting GOP, despite the constant battering. But I love the GOP! Lol. Anybody who actually continues to vote GOP at this point is completely and utterly clueless, and deserve each and every beatdown they get!
Abraham Lincoln. Of course, there was one lost election in 1856 for the new Party, the Republicans. That was necessary to show there was an alternative to the Whigs. I am guessing you meant a third party that won on its first try.
Third party is stupid. A solution is to run a non profit “nonnpartisan” university of sorts to fund for candidates which will the siphon off funds from both parties by running undrr both R and D name.