For the first time in about 1.5 centuries the top end pro-US Bank crowd are over in the Democrat party ~ I can hear Jackson rolling over in his grave.
TR's progressives gravitated early into the Democrat shell corporation ~ the business crash in the immediate post WWI period lost them the popular vote though ~ so you end up with a short string of Republican Presidents, another downturn, then 16 long years of leftist tyranny led by the same old progressives who'd blown it under Wilson.
The same is true today, of course. Gays vs. environmentalists vs. feminists vs. blacks vs. hispanics vs. outright socialists in the Democratic Party. Social conservatives vs. fiscal conservatives vs. libertarians vs. neoconservatives vs. paleoconservatives in the GOP.
Many people of course belong to more than one of these groups. Like the socialist lesbian latina environmentalist.
In most of the world, with multi-party systems, the coalitions necessary to govern are assembled after elections by negotiations between parties. Here, the negotiations take place before elections within parties.
In both systems there is a pull into the coalition created by a desire for power and greater dislike of the other side, and a push out of the coalition created by discomfort with your coalition partners.