Bill Maher is calling out the Democratic Party's drift toward its far-left wing, warning it could cost the party moderate voters.

• Maher flagged a Marxist faction inside the Democratic Socialists of America that openly says its goal is communism.
• He argued mainstream Democrats are ignoring how far left parts of the base have moved.
• The worry: if the party keeps heading this way, it loses old-school moderates who backed figures like JFK and Mario Cuomo.
• Maher framed himself as a lifelong Democrat who won't follow the "new" version of the party.

Outlook: Expect more public friction between moderate Democrats and the party's socialist wing heading into the next election cycle.