Is the Democratic Party left-wing?

[Rockefeller GOP]

Having only two major parties for 160+ years leads two a lot of diversity within those parties.  Susan Collins and Lisa Murkowski represent different Republicanism than Ted Cruz and Mike Lee, but all are Republicans.  Al Franken and Elizabeth Warren represent different brands of Democrats than Mark Pryor and Zel Miller, but all are Democrats.  Period.  I'd say within the context of American politics, both are center-right and center-left respectively.  Honestly, I don't particularly care about other countries' political spectrums; they can do what they wish.  Looking at countries whose politics are extreme compared to the American norm (e.g., Sweden) and using them to try to make the Democratic Party into this sensible, centrist party compared to its crazy far-right rival is pretty silly to me.