RICO indictment against Trump intact despite dismissal of six counts.
Ruling marks first dismissal of charges in any of Trump's four criminal cases.
Judge finds lack of detail in dismissed counts fatal to prosecution's case.
Decision pending on disqualification bid for Fulton County DA Willis.
Indictment alleges a "criminal enterprise" to overturn 2020 election results.
Four defendants plead guilty in Georgia case, including Trump allies Powell and Chesebro.
Georgia case parallels federal charges against Trump for election interference.