Fixed the Nixon description.
Agree on Trump. Everyone wants the straight-talkin' type until it becomes apparent that one needs to build coalitions to get things done. Trump is the current representation of the id in the American politics. I think Rand Paul differs from his father enough that he could build a coalition. Probably not a coalition I would agree with, but a coalition nonetheless.
Nixon was certainly ruthless, but I personally treat that more as a political asset than a character flaw. I tend to discount soft leadership styles. Somebody's got to rule the roost, so to speak.
In that same vein, RE: coalitions, I'm inclined to draw (yet another, this time more loose) parallel to British politics -- specifically the Cameron/Clegg Tory/LibDem government of 2010. Unity looks great on paper until you've got conflict and then suddenly the weaker -- or less aggressive -- ends, and their ideas, are practically banished from a pivotal place in the process. Strictly from a theoretical standpoint I'd advocate for the building of an unassailable majority (Tony Blair's Labour) that allows for unilateral decision making. The ultimate balance is that if the initiatives of a strong majority government fail you are looking at a complete turnover.
Domestically, we saw the 'New Deal' coalition fall apart because the Republicans mounted a fairly streamlined, unified effort that proved too overwhelming for the fractious Democrats. Plus, the country was evolving at an insane pace -- I think we're in a similar state of 'rapid flux' now. Sometimes people gravitate to the staid. I don't know if that time is now, though.