They didnt
They didnt
The groups disagree about how slave laws should be decided in the territories
Well, they don't split up in the beginning they split up more towards the end, probably in the middle, but they split up when Boromir dies, and Merry and Pippin are carried off by Uruk-hai, and Frodo realizes its his quest not theirs and he leaves alone except Sam nearly drowns but gets to come.
The party split over the question of allowing expansion of slavery and ended up nominating two candidates. NOVANET the democrats split into two parties and nominated 2men for president ..
Southern democrats split from the their party
dixiecrats
The Democratic vote in 1860 was split between the Southern Democrats, who were staunchly pro-slavery, and the Northern Democrats, who were less so. Each faction had its own convention and ran its own presidential candidate.
After the dissolution of the Federalist party, former federalists split into both Republicans and Democrats, but the majority became Republicans.
The Bolsheviks, who originated from a split in the Social-Democrats.
Democrats
The two parties used to be one: Conservative, but they gradually developed their own unique and different views on things, thus, creating two split sides of a party of which, they generally agreeed to be split into two: Liberal Democrats and Conservatives.
Truman was not expected to win Truman's own party split over his candidacy Democrats had put up two candidates against him