DNC Official Promised to Challenge Democratic Lawmakers. Now Leaders Are Telling Him to Abandon His Plan or Resign: Report

Activist and Democratic National Committee Vice Chair David Hogg previously pledged to fund candidates challenging incumbents "asleep at the wheel." (Getty Images)

Activist and Democratic National Committee Vice Chair David Hogg has been issued an ultimatum by the leaders of the DNC following his pledge to fund primary candidates challenging Democratic incumbents he described as "asleep at the wheel."

DNC Chair Ken Martin is expected to announce the implementation of new rules preventing DNC officers from endorsing candidates running in Democratic primaries, an anonymous source told POLITICO.