What is the latest year any of the incumbents were first elected? 
CREATE TABLE table_1342270_42 (first_elected INTEGER)
SELECT MAX(first_elected) FROM table_1342270_42
### Context: CREATE TABLE table_1342270_42 (first_elected INTEGER) ### Question: What is the latest year any of the incumbents were first elected?  ### Answer: SELECT MAX(first_elected) FROM table_1342270_42