Founding of the Republican Party. On July 6, 1854, just after the anniversary of the nation, an anti-slavery state convention was held in Jackson, Michigan. The hot day forced the large crowd outside to a nearby oak grove. At this “Under the Oaks Convention” the first statewide candidates were selected for what would become the Republican Party.
https://www.gop.com/history/
Republican Party which had become evident in the course of the two preceding Congresses had coalesced into two new Major Parties: the Democratic Republicans (the one-time Jackson Republicans) and the National Republicans (the one-time Adams Republicans).
http://www.thegreenpapers.com/Hx/AmericanMajorParties.html
Abraham Lincoln, the first Republican President (1861–1865) The Republican Party, also commonly called the GOP (for Grand Old Party), is one of the world's oldest extant political parties. It is the second oldest existing political party in the United States after its primary rival, the Democratic Party.
https://en.wikipedia.org/wiki/History_of_the_United_States_Republican_Party
Party of Freedom. Though popularized in a Thomas Nast cartoon, the GOP’s elephant symbol originated during the 1860 campaign, as a symbol of Republican strength. Republicans envisioned “free soil, free speech, free labor.” Under the leadership of President Abraham Lincoln, the GOP became the Party of the Union as well.
https://www.gop.com/history/
and the Two-Party System in the United States. Most historical literature refers to the Party of the Washington Administration as the Federalists with those in opposition to the policies of that Administration as Antifederalists; however, the use of these designations is, in fact, more than a little inaccurate.
http://www.thegreenpapers.com/Hx/AmericanMajorParties.html
History of the United States Republican Party. The Republican Party, also commonly called the GOP (for Grand Old Party), is one of the world's oldest extant political parties. It is the second oldest existing political party in the United States after its primary rival, the Democratic Party.
https://en.wikipedia.org/wiki/History_of_the_United_States_Republican_Party
The Origins of the Republican Party. Trying times spawn new forces. The Missouri Compromise of 1820 divided the country at the 36° 30' parallel between the pro-slavery, agrarian South and anti-slavery, industrial North, creating an uneasy peace which lasted for three decades.
http://www.ushistory.org/gop/origins.htm
Republican Party founded. In Ripon, Wisconsin, former members of the Whig Party meet to establish a new party to oppose the spread of slavery into the western territories. The Whig Party, which was formed in 1834 to oppose the “tyranny” of President Andrew Jackson, had shown itself incapable of coping with the national crisis over slavery.
http://www.history.com/this-day-in-history/republican-party-founded
By 1855, the Republican Party controlled a majority in the House of Representatives. The new Party decided to hold an organizing convention in Pittsburgh in early 1856, leading up to the Philadelphia convention.
http://www.ushistory.org/gop/origins.htm
By February 1854, anti-slavery Whigs had begun meeting in the upper midwestern states to discuss the formation of a new party. One such meeting, in Wisconsin on March 20, 1854, is generally remembered as the founding meeting of the Republican Party. The Republicans rapidly gained supporters in the North, and in 1856 their first presidential candidate, John C. Fremont, won 11 of the 16 Northern states.
http://www.history.com/this-day-in-history/republican-party-founded
history of republican party
The Republican Party, also commonly called the Grand Old Party, is one of the world's oldest extant political parties. It is the second oldest existing political party in the United States after its primary rival, the Democratic Party.