Without moderates, no one would notice. There just aren't that many of them. Most who do profess to be "moderate" are simply one of the many flavors of plain old liberal.
"Moderate" or "middle of the road" is fabricated terminology crafted by the Left to force the Republican to become more liberal so that conservatives can stay home and the Dem will win.
And of course that is wrong, as any analysis of voting stats would demonstrate. It takes a village, including some that others would consider the village idiots. Just who those idiots are varies percipient witness, by percipient witness, and thus is a subject of debate, of course. Of course.