Question: What is the highest First Elected, when Party is "Republican", and when District is "Louisiana 7"?
SQL: SELECT MAX("First elected") FROM "2-1805191-19" WHERE "Party" = 'Republican' AND "District" = 'Louisiana 7';

Question: What is Party, when Results is "Re-elected", and when District is "Louisiana 5"?
SQL: SELECT "Party" FROM "2-1805191-19" WHERE "Results" = 'Re-elected' AND "District" = 'Louisiana 5';

Question: What is Party, when Incumbent is "Rodney Alexander"?
SQL: SELECT "Party" FROM "2-1805191-19" WHERE "Incumbent" = 'Rodney Alexander';

Question: What is Results, when First Elected is less than 1988?
SQL: SELECT "Results" FROM "2-1805191-19" WHERE "First elected" < 1988.0;

Question: What is Incumbent, when District is "Louisiana 4"?
SQL: SELECT "Incumbent" FROM "2-1805191-19" WHERE "District" = 'Louisiana 4';