Veterans of the Democratic establishment, unsettled by Representative Alexandria Ocasio-Cortez’s lack of deference to seniority and party unity, have cautioned the freshman lawmaker to direct her potent social-media attacks toward Republicans rather than centrist Democrats. “I’m sure Ms. Cortez means well, but there’s almost an outstanding rule: Don’t attack your own people,” Representative Emmanuel Cleaver (D., Mo.) told Politico.
