Question: Who is the Republican Incumbent for Pennsylvania 9?
SQL: SELECT "Incumbent" FROM "2-1805191-39" WHERE "Party" = 'Republican' AND "District" = 'Pennsylvania 9';

Question: What are the results for Bill Shuster?
SQL: SELECT "Results" FROM "2-1805191-39" WHERE "Incumbent" = 'Bill Shuster';

Question: What is the greatest first elected for Pennsylvania 10?
SQL: SELECT MAX("First elected") FROM "2-1805191-39" WHERE "District" = 'Pennsylvania 10';