I remember some years ago there was an option to vote Democrat or Republican. It may have been on voting machines, but that's gone now.There's no valid reason to vote for either party.
There's also no valid ability to vote for either party.
In American politics, ballots are cast for individuals rather than for parties. The people select the candidates through primary elections, not party leadership. Political parties are subordinate to the whims of the people, and the vast majority of politicians throughout every level of governance cast their political party's stated ideology aside to assure contributions to their campaign fund--thus securing their re-election--and to clear the way for a trip through the revolving door, gaining an over-paid executive position at a private company after they leave office.
Parties tend to be principled. Candidates, by and large, are not. The logical course of action would be to vote for the minority of principled candidates rather than hucksters who have nothing to do with political parties, yet run as a member of one simply to get elected.