Also a term of political
machination, made famous by
Bill Clinton and his infamous
pollster, Dick Morris, who also worked for
Republicans.
They decided how far right they could go, so as not to repulse too many of their core supporters, but get enough of their opponents on-side to maintain power.
This has only succeeded in alienating most from the political system by blurring much of the distinctions between Democrat and Republican.
Also practiced by Tony Blair as Blatcherism, and Bob Rae under no particular name.