See Neocon and Paleocon below:
He contends that the conservative movement started with the Whig Party of the 1830's and 40', which arose to power to oppose Andrew Jackson's Democratic Party after they destroyed the all-powerful Second Bank of the US. "The Whigs built a national following dedicated to protecting business and reducing federal economic regulation. By combining a pro-business conservatism geared to the common man with an evangelical Christian view of social virtues and vices, they won the presidency twice in the 1840's and controlled either the House or the Senate for most of the decade.
A century and a half before Reagan's election, the Whigs worked out the basic ideas of supply-side, trickle-down economics. They claimed the romance of risk and private investment and a compelling but simplistic view of America as, in one widely used Whig phrase, "a country of self-made men."
Parties realligned in the 1850's over the slavery issue. The Whig party collapsed; its anti-slavery wing joined the anti-slavery Democrats in the north to form the Republican party in 1854 after the Democratic party was taken over by the southern states.
In "Dixiecrats" at u-s-history.com they say:
At the 1948 Democratic National Convention, some controversial new civil rights planks of racial integration and the reversal of Jim Crow laws were proposed for the party platform. 35 southern Democrats walked out in protest. They formed the States' Rights Democratic Party, which became popularly known as the Dixiecrats.
New York moderate Nelson Rockefeller's defeat in the presidential primary in 1960 election marked the beginning of the end of moderates and liberals in the Republican Party.
Clearer political and ideological lines began to be drawn between the Democrat and Republican parties as moderates and liberals converted from Republican to Democrat. Conservatives in the Democratic Party began to move to the increasingly conservative Republican Party.
The 1960's marked a shift in political ideologies.
Neocon (Neoconservative) - A right-wing political philosophy that emerged in the United States from the rejection of the social liberalism, moral relativism, and New Left counterculture of the 1960s. In United States, they align themselves with most conservative values, such as free market, limited welfare, and traditional cultural values.
Paleocon (Paleoconservatism) - a term for an anti-communist and anti-authoritarian right-wing movement in the United States that stresses tradition, civil society and classical federalism, along with familial, religious, regional, national and Western identity.
See Movements below for things like Alt Right, White Nationalist, ...
Nate Silver's 5 categories for presidential candidates.
Movements: Alt-Right - A set of far-right ideologies, groups and individuals whose core belief is that "white identity" is under attack by multicultural forces using "political correctness" and "social justice" to undermine white people and "their" civilization. Characterized by heavy use of social media and online memes, Alt-Righters eschew "establishment" conservatism, skew young, and embrace white ethno-nationalism as a fundamental value.