Ok but really objectively consider that statement though.
Policy by policy the Dems flank left of most of Europe’s old guard of social democratic and socialist parties. Dems tend to be more in favor of new and expanded welfare programs compared to their European counterparts, they’re less likely than said counterparts to adopt right wing policy and talking points to try and appease alt-rightified voters, and on social issues there is no contest, just say the word “Roma” and watch Europeans range from saying that pulling that card isn’t fair because “that’s different” to saying that what the fascists did wrong was lose before they finished the job on the Roma.
The metric by which America has no left is one by which the western world at large has no left, and at that point what value is gained at all by insisting on it?