What 2 political parties are in the US of America?

Republican and Democratic

The five political parties and their founding dates:

* Democratic party --- 1828 * Republican party --- 1854 * Libertarian party --- 1971 * Green party --------- 1984 * Constitution party - 1992
I know that John Adams and Thomas Jefferson started them, and that they were classified as 'liberal' and 'conservative'. They evened each other out, even though the two Founding Fathers were not on the best terms. Only later were those two parties called democrats and republicans.