Why the Twelfth Amendment?
Nevertheless, the idea of the President and the Vice-President being from different parties is an interesting one. In fact, that was the way it was when the country started. Although political parties had not yet been formed (and George Washington had cautioned against even having them), there were distinct differences between public figures in those days. Washington, an aristocratic Virginia planter, had John Adams, a Massachusetts lawyer, as his Vice President. If there had been organized parties then, they would have been in different ones.
Hence, our second President, John Adams (a believer in a strong central government), was stuck with Thomas Jefferson (a believer in states’ rights) as his Vice-President. When Jefferson became President, he was stuck with the Presidential loser, Aaron Burr, another believer in a strong central government, as his Vice President. Jefferson and Burr actually were tied in the Electoral College with the House of Representatives deciding the issue in favor of Jefferson. (Burr’s killing of Alexander Hamilton in a duel in 1803 is said to have resulted from bad feelings between the two men, which may have stemmed from Hamilton’s role in the House of Representatives deciding the election in favor of Jefferson.)