The SKUSA SuperNationals is a sprint kart championship contested across five classes: KA100 Senior, Pro X30, Pro Shifter, X30 Junior, and KA100 Junior. The field sits at the semi-professional level, with the senior classes notably stronger than the junior divisions. Alessandro de Tullio, Remo Ruscitti, and Scott Hargrove rank among its top drivers. The series functions as a crossroads: it draws drivers arriving from higher-level single-seater and GT racing, while its graduates move both upward to IMSA WeatherTech and WEC and downward to club-level SCCA competition. The SuperNationals sits well clear of club racing and notably stronger than SCCA Majors and Regionals, though substantially below IMSA's professional prototype and GT3 ranks.