1796 - Switch from non- partisan to having two seperate parties take majority, the democratic-republic and federalist
Switches so far: 2
1828 - Another double switch with two new parties coming into replace the old two majorities, the National Republican, and the Democratic
Switches so far: 4
1836 - The Whig party replaces the National Republic party
Switches so far: 5
1856 - The Republican party replaces the whig party
Switches so far: 6
1912 - The BullMoose party replaces the Republican party as a majority
Switches so far: 7
1920 - The Republican party replaces the Bull Moose party again.
Total switches: 8