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_1420 ( "District" text, "Incumbent" text, "Party" text, "Elected" real, "Status" text, "2008 Candidates" text, "Results" text )

### Question ###
How many groups of candidates are there in there in the district where the incumbent is Doc Hastings?

### Accurate SQL ###

SELECT COUNT("2008 Candidates") FROM table_1420 WHERE "Incumbent" = 'Doc Hastings'