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 | Result | Candidates |
| --- | --- | --- | --- | --- | --- |
| Texas 1 | Wright Patman | Democratic | 1928.0 | Re-elected | Wright Patman (D) Unopposed |
| Texas 2 | Jack Brooks | Democratic | 1952.0 | Re-elected | Jack Brooks (D) Unopposed |
| Texas 3 | Brady P. Gentry | Democratic | 1952.0 | Re-elected | Brady P. Gentry (D) Unopposed |
| Texas 4 | Sam Rayburn | Democratic | 1912.0 | Re-elected | Sam Rayburn (D) Unopposed |
| Texas 5 | Joseph Franklin Wilson | Democratic | 1946.0 | Retired Republican gain | Bruce R. Alger (R) 52.9% Wallace Savage (D) 47.1% |
| Texas 6 | Olin E. Teague | Democratic | 1946.0 | Re-elected | Olin E. Teague (D) Unopposed |
| Texas 7 | John Dowdy | Democratic | 1952.0 | Re-elected | John Dowdy (D) Unopposed |
| Texas 9 | Clark W. Thompson | Democratic | 1947.0 | Re-elected | Clark W. Thompson (D) Unopposed |
| Texas 10 | Homer Thornberry | Democratic | 1948.0 | Re-elected | Homer Thornberry (D) Unopposed |
| Texas 11 | William R. Poage | Democratic | 1936.0 | Re-elected | William R. Poage (D) Unopposed |
| Texas 12 | Wingate H. Lucas | Democratic | 1946.0 | Lost renomination Democratic hold | Jim Wright (D) Unopposed |
| Texas 13 | Frank N. Ikard | Democratic | 1951.0 | Re-elected | Frank N. Ikard (D) Unopposed |
| Texas 14 | John E. Lyle, Jr. | Democratic | 1944.0 | Retired Democratic hold | John J. Bell (D) 93.8% D. C. DeWitt (R) 6.2% |
| Texas 15 | Lloyd Bentsen | Democratic | 1948.0 | Retired Democratic hold | Joe M. Kilgore (D) Unopposed |
| Texas 16 | Kenneth M. Regan | Democratic | 1947.0 | Lost renomination Democratic hold | J. T. Rutherford (D) Unopposed |
| Texas 17 | Omar Burleson | Democratic | 1946.0 | Re-elected | Omar Burleson (D) Unopposed |
| Texas 19 | George H. Mahon | Democratic | 1934.0 | Re-elected | George H. Mahon (D) Unopposed |
| Texas 20 | Paul J. Kilday | Democratic | 1938.0 | Re-elected | Paul J. Kilday (D) Unopposed |
| Texas 21 | O. C. Fisher | Democratic | 1942.0 | Re-elected | O. C. Fisher (D) Unopposed |
Question:
In what district was incumbent first elected in 1938? 
Answer:
Texas 20