I have no formal training in matters of history outside of a public school education that ended with a High School diploma. So it is quite possible that I am missing some nuance and would welcome those more learned than I to chime in.
While discussing third party alternatives in recent Presidential elections, someone I know pointed out to me that Abraham Lincoln could have been considered a Third Party candidate. This surprised me because I was led to believe that he was a Republican.
So I hit the Googles and the Wikis and there is a germ of truth since by one yardstick, the Republican Party was a newly-created third party alternative to the Whigs and Democrats. However, it seems that by the time 1860 rolled around, the Republicans had already displaced the Whigs as the dominant party, at least on the national level with most of the North voting Republican in that election and there wasn’t a Whig on the ballot (former Whig John Bell ran under the Constitutional Union Party, which garnered some support from ex-Whig and Know Nothing Party members).
In any event, this fascinated me but I wondered how the Whigs vanished from the political landscape and were replaced by the Republicans. According to Wiki, “The party was ultimately destroyed by the question of whether to allow the expansion of slavery to the territories. With deep fissures in the party on this question, the anti-slavery faction prevented the re-nomination of its own incumbent President Fillmore in the 1852 presidential election; instead, the party nominated General Winfield Scott. Most Whig party leaders thereupon quit politics (as Lincoln did temporarily) or changed parties. The northern voter base mostly joined the new Republican Party. By the 1856 presidential election, the party was virtually defunct.”
So from what I can tell, all it took was a difference of opinion on one issue - slavery - to cause a political party that had elected four Presidents to splinter and vanish within a few years and get completely replaced by the Republican Party and aside from the occasional Bull Moose or H. Ross Perot anomaly, was pretty much when the two-party system as we currently know it was born.
Let’s look now to the current state of the Republican party. It, too, has warring factions from within. On one hand you have the fiscal conservatives and on the other, you have the Religiously-motivated right wing of the party that cares considerably more about social issues than their Libertarian-leaning fellow Republicans.
If the rights of slaves broke up a party, why can’t the rights of gays and women be the issue that causes the Republicans to go the way of the Whigs (quite literally in this case)?
I don’t know how likely it is, but if the upcoming election gives Democrats the White House, the Senate and the House, that can be the straw that really sets the Republican Party into ideological chaos.
(As for the likelihood of this, according to 538.org’s Nate Silver, right now Obama wins about 85% of the time and Democrats control the Senate 80% of the time. In June he gave Democrats only a 4-to-1 chance of retaking the house, however he hasn’t examined it since then. It is possible that the Obama-down-ticket surge in the Senate - which on Aug. 19th favored Republicans to win control 61.5% of the time but in only five weeks flipped to the aforementioned 80% Democratic advantage - may have an impact on House races as well.)
Or maybe Dems will just keep the Senate and White House but the next four years will be prosperous (indicators say that we should do better regardless of major policy changes thanks to the recovery) and in 2016 the Democrats sweep an ever-dysfunctional Republican Party away and the shit really hits the fan. As dysfunctional was the 2012 nomination process, maybe 2016 is even more of a clusterfuck of competing ideologies - similar to the Whigs in 1852…?
But it also seems that regardless of how bad they fuck things up and how splintered the GOP becomes, it’s just hard for me to envision a world without them even with a Libertarian Party that is increasingly becoming a place for displaced Republicans than Progressives and the Tea Party phenomenon. But was it hard to envision a Whig-free world in the 1850s before it actually happened? I don’t know.