Lost the game
Banned
With a post-Watergate POD, your mission is not to prevent the GOP's Southern Strategy, but to get most commentators and GOP establishment officials to consider it a failure, not to be repeated after Nixon makes use of it.
Ford wins in 1976. Reagan/Rumsfeld lose in 1980. Kemp/Swaggart lose in 1984. Robertson/Gingrich lose in 1988. The final straw is the loss of Trent Lott in 1992.
When the GOP gets elected in 2004, they focus on a populist strategy, as opposed to their attempts to run social conservatives in the 80s to early 90s.
With a post-Watergate POD, your mission is not to prevent the GOP's Southern Strategy, but to get most commentators and GOP establishment officials to consider it a failure, not to be repeated after Nixon makes use of it.
I really see no way to do this, the Black vote was too against the GOP heavily by then while the dissatisfaction of Southerners with the Democrats made them too big a prize to ignore. Had Nixon lost in 1968, maybe then you could've got the GOP to avoid it as a strategy while the AIP could linger around for a time.
Wallace did campaign for an American Party candidate for Congress in 1969 in a Wallace-friendly district (TN-08 which went 48% Wallace, 28% Humphrey, 24% Nixon in 1968). It didn't turn out too well. From the original Almanac of American Politics (1972), p. 772:
***
EIGHTH DISTRICT Political Background
"Tennessee 8 comprises the northwest corner of the state. The district extends from the TVA lakes of the Tennessee and Cumberland rivers at the Kentucky state line to the city of Memphis. This area, physically and politically, resembles the Mississippi Delta country or eastern Arkansas: flat cotton lands, occasional small towns, and a population running about 24% black. The largest city in the district outside of the Memphis area is Dyersburg, with 14,000 residents. Most of the counties here are traditionally Democratic, but only those around the Tennessee River have given statewide Democratic candidates significant margins in recent years. Most of the rest of them responded favorably to the thinly-disguised segregationist appeals of Republican candidates like Sen. William Brock. The Shelby County (Memphis) portion of the 8th, like that of the 7th, is heavily white and very conservative.
"Perhaps because of its long-standing Democratic tradition, Tennessee Republicans did not strenuously contest congressional elections in the 8th for some time. From 1958 to 1969, the district was represented by conservative Democrat, Bob Everett, who faced Republican opposition only once during his tenure. In 1969, Everett died and a special election was called. George Wallace, who had carried the 8th with nearly 50% of the votes in 1968, came in to campaign for American party candidate William Davis, while Sen. Baker and other conservative Republicans stumped for the Republican, Leonard Dunavant. The race got some attention in the national press as a test of the Wallace and Nixon strategies in the South.
"The result made both look rather bad. Davis won 25%, Dunavant took 24%, and the winner, conservative Democrat Ed Jones, won 51% and an absolute majority, in the race. Jones, former commissioner of agriculture, had not asked outsiders to come in and campaign for him; he wisely relied on the traditional Democratic sentiments of the voters of his district. These people may plunk for Wallace in a presidential elec1tion and they may applaud some of the policies of the Nixon Administration, but most them preferred to stay with a Tennessee Democrat in what is, after all, a local election. Then too, against Wallace- and Nixon-backed candidates, Jones won the black vote with no effort at all. ..."
***
See https://www.ourcampaigns.com/RaceDetail.html?RaceID=373578 for the results of the election (and a map of the district as of 1969).
Jones https://en.wikipedia.org/wiki/Ed_Jones_(U.S._politician) went on to be re-elected with few problems until he retired in 1988. Nixon's easy victory in the district in 1972 and Reagan's in 1984 didn't bother him at all. And that indeed was the problem with a third party in the South: people might vote for Wallace at the presidential level or for Nixon against McGovern in 1972 but why change your habit of voting for more-or-less conservative Democrats in congressional and other "local" elections? It was really only in 1994 that this habit was broken in much of the South.
AIP probably would not be too successful in CD and state elections.
This is probably the ultimate repudiation of the "Southern Strategy." It happened OTL.
My take on the Southern Strategy is that it just flat-out didn't actually work that well lol. Then the South swerved Republican for other reasons (ie, affluent suburbs springing up that regardless of their views on race, didn't behave that differently from affluent suburbs in the North and West - because it's not like hating on government programs by falsely claiming they only help blacks is a uniquely Southern thing), and then everyone (Republicans included) concluded that the Southern strategy was a great success.
Sean Trende, a remarkably well-respected elections analyst (on both sides of the aisle) has a pretty interesting read on it. I don't completely agree with it, but it's certainly more nuanced and fair than the typical "all Southern whites refused to support what we wanted because they're all racist" narrative that tries to explain the political development of the South. https://www.realclearpolitics.com/a...standing_the_southern_realignment_107084.html
Social issues had the effect of pushing the entire South to the right and civil rights is clearly one of those, but there's a LOT of social issues (like say, hardcore Christians caring about "acid, amnesty, and abortion"). And even then, many many many white Southerners stuck with the Democratic Party. The part of the South that most dramatically left the Democratic Party first were the new affluent (and almost entirely white) suburbs of the South, which quickly became some of the most hardcore conservative voters in America. Jesse Helms's base was affluent white suburbs, not working-class whites. It was similarly those rich, white suburbs of Atlanta that in 1992, elected Georgia's only Republican, Newt Gingrich.
The Southern-strategy-did-everything-argument is an especially appealing narrative for some today, because it's those affluent white suburbanites who are the demographic most decisively turning AWAY from the Republican Party today. Newt Gingrich's old district in Georgia voted for Romney by 20 points and is now a solidly blue district (a massive shift like that cannot be explained by demographic change, which is far slower than everyone thinks). The idea that all of the political changes in the South can be attributable to a campaign trick by Ronald Reagan pretty conveniently allows those newly woke voters "blame" Ronald Reagan on working-class whites, when it was people like their neighbors and friends (aka, rich, suburban, and white) who tilted the South towards Reagan against the desires of most working-class Southern whites. And obviously, the idea of monolithic racial groups completely erases the impact of economic class (and how class and race can intersect).
It's also appealing to partisan liberal Democrats in America, because a tendency of all partisans is to assume everyone on their side is a feckless, weak moron, and everyone on the other side is diabolical, brilliant, and super-competent (because this explains why their seemingly obvious ideas just don't win out all the time). It's challenging for someone to go "yeah, our opponents are idiots and made crude racist appeals that didn't work out for them, just totally debasing themselves", because then they have to answer how they managed to lose elections to those "idiot" opponents. I suppose the right-wing equivalent of that is conservatives who believed that the USSR was some super-evil, super-competent force that was cleverly sabotaging conservatism everywhere and America in places like Vietnam with the mystical power of Communism, ignoring both the flaws of American policy in Vietnam and the many uh, many many incompetencies of the Soviet Union.
EDIT: It's also important to note that Richard Nixon himself actually believed his Southern Strategy had failed and said that the path forward for the GOP...would be attracting more minority and youth voters lol. So uh, OTL, the Southern Strategy was literally considered a failure by the guy who tried it. https://www.nixonlibrary.gov/sites/...ontested/contested_box_49/Contested-49-54.pdf
lol, now that I think about it, the best way to keep the Southern strategy considered a failure is to avoid Watergate and keep Richard Nixon as President until 1976. Because Richard Nixon considered his 1970 Southern strategy a failure. If viewed as an extremely successful two-term President, then Nixon would probably have the political capital to make sure the Republican candidate in 1976 was honestly someone who agreed with his views on this and most other issues.
The southern strategy was a process. The south went from racial polarised, with nearly all whites voting for Democrats, and Blacks backing Republican (if they could vote). Then it switched totally. It absolutely worked out for them, and in terms of electoral politics, the GOP has often mouthed support for tacking towards minorities. But it always ends up falling thought, since it keeps happening from Nixon to 2012. But electorally whites consistently vote and are well distributed for a winner take all electoral college. Even now Republicans could continue holding the EC by improving a few more points with white non-college voters, even as the nation diversifies.