You may have misunderstood my point.
I'm saying that the center, the political center, "feels" more like the Left these days because in the last forty years we have been steadily drifting further and further Right. To illustrate, Many of Reagan's policies, and bills he signed in cooperation with both Republicans and Democrats, and his tax policies, would look very "lefty" if enacted today, and Ike Eisenhower was approximately where Joe Biden was for many years.
But speaking of Biden, he IS flipping and moving on many of his long held views precisely BECAUSE of pressure from today's Left, but in the end, the net result would be that we'd wind up approximately in what was for years regarded as the Center.
FDR was somewhat Left, Truman a little less so, Eisenhower was the Center, Kennedy slightly to the Left, Johnson slightly more to the Left, Nixon was Center-Right, Ford was a little more to the Center, Carter slightly more to the Left, then came Reagan and the long slow drift to the Right again, Bush more to the Center again, Clinton more to the Center, Bush 43 moderately Right, Obama "talked" Left but functioned as if he wanted to be more to the Center. Trump has moved us way to the Right.
I don't expect you to agree either. You'll probably say that Obama was six inches from being a Marxist, but that is because you're pretty far to the Right, so to you, he looks like a Marxist.
PS: I would like to believe that Joe Biden has evolved but my gut tells me it's just for show.