Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_47384 ( "Poll Source" text, "Dates administered" text, "Democrat: Brian Schweitzer" text, "Republican: Roy Brown" text, "Libertarian: Stan Jones" text, "Lead Margin" real )

### Question ###
What was the lead margin when Schweitzer had 55% and Jones had 2%?

### Accurate SQL ###

SELECT SUM("Lead Margin") FROM table_47384 WHERE "Democrat: Brian Schweitzer" = '55%' AND "Libertarian: Stan Jones" = '2%'