Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| District | Incumbent | Party | First elected | Results |
| --- | --- | --- | --- | --- |
| Iowa 1 | Jim Nussle | Republican | 1990.0 | Retired to run for Governor Democratic gain |
| Iowa 2 | Jim Leach | Republican | 1976.0 | Lost re-election Democratic gain |
| Iowa 3 | Leonard Boswell | Democratic | 1996.0 | Re-elected |
| Iowa 4 | Tom Latham | Republican | 1994.0 | Re-elected |
| Iowa 5 | Steve King | Republican | 2002.0 | Re-elected |
Question:
From which party is the incumbent who was first elected to office in 1990?
Answer:
Republican