That's basically what I said in my post. To wit: "Prior to [the 20th century], pretty much the whole American public [that is, of both political parties] apart from a few socialist radicals was conservative - at least going by the six tenets you posted on that other thread." (You may have misunderstood me when I said the Republicans were no more conservative than Democrats. I wasn't referring to modern Democrats, but to Democrats of that time period.) My point was not that 19th-century Republican administrations weren't conservative; my point was that they weren't the sole indicators of what American conservatism was.
As conservatism was the guiding philosophy of American political life at the time, and as the limited and largely unsuccessful attempts by certain Republican administrations to expand our influence overseas apparently didn't meet with much broad-based support at home, I feel comfortable in concluding that such inclinations on their part did not represent, to any sizable degree, what conservatism was understood to mean.