For the people who say there are not other choices. This is a list of third parties across the fruited plain. No comment on anything including if they are still active.


AMERICA FIRST PARTY
AMERICAN INDEPENDENT PARTY
AMERICAN NAZI PARTY
AMERICAN PATRIOT PARTY
AMERICAN REFORM PARTY ( I think also Perot group)
CENTRIST PARTY
CHRISTIAN FALANGIST PARTY OF AMERICA
COMMUNIST PARTY USA
CONSTITUTION PARTY*
DEMOCRATIC SOCIALISTS OF AMERICA PARTY
FREEDOM SOCIALIST PARTY/RADICAL WOMEN
GREEN PARTY OF THE UNITED STATES (GREEN PARTY)
GREENS/GREEN PARTY USA (G/GPUSA)
INDEPENDENCE PARTY
INDEPENDENT AMERICAN PARTY
LABOR PARTY AKA in Minnesota as the Farm-Labor Party.
LIBERTARIAN PARTY*
LIGHT PARTY
NATURAL LAW PARTY
PEACE AND FREEDOM PARTY
PROGRESSIVE LABOR PAR
PROHIBITION PARTY
REFORM PARTY (part of Perot Populists)
SOCIAL DEMOCRATS USA PARTY
SOCIALIST ACTION PARTY
SOCIALIST EQUITY PARTY
SOCIALIST LABOR PARTY
SOCIALIST PARTY USA
SOCIALIST WORKERS PARTY
U.S. MARIJUANA PARTY
U.S. PACIFIST PARTY
VETERANS PARTY OF AMERICA*
WE THE PEOPLE PARTY
WORKERS PARTY USA
WORKERS WORLD PARTY
WORKING DEMOCRACY PARTY
WORLD SOCIALIST PARTY OF THE USA

They didn't and stated so list the Nazi Party as such but National Socialists or National Socialist Labor Party is the usual code. Nor the Tea Party nor the Populists with no explanations. They did list the Party Hardy. See if you can find it.
* Ones I follow and pay attention to.
I also do not know if the list is accurate as to current.

The other list is Democratic-Republicans, Federalists, Whigs, Free-Soilers, American, Northern Democrats, Southern Democrats, Bul Moose, Copperheads, Prohibition Party, Women's Party and some I forgot no longer active. Most because they go back to 1787.