“Democrats, please, please don’t lose your minds and rush to the socialist left,” Comey implored in a tweet on Sunday. “This president and his Republican Party are counting on you to do exactly that. America’s great middle wants sensible, balanced, ethical leadership.”

Days beforehand, Comey, a registered Republican for most of his adult life, called for a ‘blue wave’ to sweep Republicans from power in November’s midterm elections. “This Republican Congress,” he wrote, “has proven incapable of fulfilling the Founders’ design.”

Comey has become a figurehead of the anti-Trump #resistance since Trump fired him unceremoniously last May for his botched handling of the FBI’s investigation into Hillary Clinton’s unauthorized email server use. However, before he shifted his ire to Trump, many Democrats blamed Comey’s announcement that the agency was reopening the Clinton investigation - one week before the 2016 election - for Clinton’s loss.

Still bitter about 2016, some critics on Twitter didn’t let the former agency head forget their beef.

While Comey’s Sunday tweet did not explicitly mention any names, the shocking primary victory of 28-year-old ‘democratic socialist’ Alexandria Ocasio-Cortez in New York in June has been perhaps the clearest indication yet that Democrats are embracing the party of Bernie Sanders rather than the party of Hillary Clinton. Campaigning on a platform of Medicare for all, free university tuition, gun control and abolishing Immigration and Customs Enforcement, Ocasio-Cortez ousted her 10-term incumbent, Rep. Joe Crowley.

To some Twitter observers, Comey’s tweet is the last gasp of a dying form of Democrat politics, one that was beaten in the 2016 election, and now looks out of step with the demands of young progressives.