user: Question: Who is Jason Leffler's primary sponsor?
Columns: ['Team', 'Car(s)', '#', 'Driver(s)', 'Primary Sponsor(s)', 'Listed Owner(s)', 'Crew Chief']
Types: ['text', 'text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['BAM Racing', 'Dodge Charger', 49.0, 'Ken Schrader', 'Schwans', 'Beth Ann Morganthau', 'David Hyder']
SQL:

assistant: SELECT "Primary Sponsor(s)" FROM "Table" WHERE "Driver(s)" = 'Jason Leffler';