The founders were seriously opposed to party politics.
And Democrats (official ones at least) did not elect Republicans. WE did.
That is true, however they did try to mitigate as much ambition as they could.
Even during their days they had the Federalists and the Anti-Federalists, but when it came to the fundamentals they were all on the same page.
That is how we got our Founding documents with much less rancor than the French Revolution garnered.