All it needs is a start point to make it fairly accurate. If you're not from the US the politics of the 1700's and 1800's are actually kind interesting unlike the slop we got after something like 1975. Hell, as a point of intrigue, the Civil Rights Act of 1964 was at least "interesting." At the time the parties maintained much of their core belief (Democrat = big Fed, Republican = small Fed), but the implementation was split by North vs South. This led to some interesting situations where anti big Fed Republicans in the north votes for big Fed regulations while pro big Fed Democrats in the south voted against big Fed regulations. US politics used to be interesting, hell even as recently as 2012 we had situations where Republicans were trying to find avenues for conservative value illegal immigrants as a means to bolster their ranks, but all that fell through because the existing rank and file couldn't stomach illegal brown people taking jobs they didn't want.
Now US politics seems to be Fascist vs not Fascist while there are no true alternatives.