Table: election_results_1948
Columns: district
incumbent
party
first_elected
result
candidates

Question: What candidate was re-elected and was first elected in 1942? 
SQL: SELECT "candidates" FROM election_results_1948 WHERE "result" = 'Re-elected' AND "first_elected" = 1942

Question: Who are the candidates in the election in the Ohio 9 district? 
SQL: SELECT "candidates" FROM election_results_1948 WHERE "district" = 'Ohio 9'

Question: What year was incumbent Michael A. Feighan first elected? 
SQL: SELECT MIN("first_elected") FROM election_results_1948 WHERE "incumbent" = 'Michael A. Feighan'

Question: What party does the incumbent from the Ohio 5 district belong to? 
SQL: SELECT "party" FROM election_results_1948 WHERE "district" = 'Ohio 5'

Question: What party does the incumbent from the Ohio 20 district belong to? 
SQL: SELECT "party" FROM election_results_1948 WHERE "district" = 'Ohio 20'

Question: What party does the incumbent from the Ohio 7 district belong to? 
SQL: SELECT "party" FROM election_results_1948 WHERE "district" = 'Ohio 7'